LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale
LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale_top
LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale__left
LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale__right
LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale__after
LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale__front

  • Locks on, does not leak
  • 1/8" NPT compatible with all grease guns - battery, pneumatic, manual
  • World''s only rebuildable grease coupler. Lowest lifetime cost.

  • Unique patented design. Locks on.....Stays on....No leaks!
  • Four hardened spring steel jaws are resilient under high pressure - over 10,000 psi.
  • End the waste. End the mess. End greasing frustration.
  • Fits all Grease Guns - 1/8” NPT fitting.
  • Fits all SAE and Metric Zerk fittings. Simply replace your existing coupler, click the orange button on the right to buy.
  • Pressure locked? No problem. Easily releases from clogged fittings, even at extreme pressures.
  • Patented Locking Technology. US Patent 8955544

Upgrade your grease gun and END GREASING FRUSTRATION


Recessed fittings? No problem

You know the grease is going in, even if you can't see the Zerk. You don't have to fight to get the coupler to release. Just push down the thumb lever to release.


Our Promise

Your bearings will thank you. The LockNLube Grease Coupler will help you end greasing frustration. When greasing is easier, it gets done more often. Regular greasing improves machine life and uptime.


It almost makes greasing fun

Greasing is a messy job, but it doesn't have to be a frustrating one. Upgrade your grease gun today with LockNLube and start saving grease, saving time, and get rid of the daily frustrations that bad greasing equipment brings.

Product information

    Additional Information

  • ASIN: B00H7LPKKU
  • Customer Reviews: 4.8 out of 5 stars 18,551Reviews
  • Best Sellers Rank:
    #75 in Automotive (See Top 100 in Automotive)
    #1 in Grease Guns
  • Date First Available: December 9, 2013
Product Warranty: For warranty information about this product, please click here
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Product guides and documents

Specification Sheet (PDF)
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Customer Questions

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Q: Does this work with Milwaukee grease guns?

A: It works on my Milwaukee M18 grease gun. These things are amazing.

SneakyGunz | 6 months ago

Q: Where is this product manufactured?

A: It is a quality product made in South Africa by Gurtech.

New Zoo Review | 2 months ago

Q: After installing it, I couldn''t depress the gun''s pump. What did I do wrong?

A: Between myself and friends we have successfully installed five of these fittings without a…

Green Rider | 6 years ago

Q: It is just the fitting or does it include the flexible line?

A: It is just the fitting. The hose was included to give context and sense of scale.

Seller LockNLube | 7 years ago

Customer reviews

4.8 out of 54.8 out of 5
18,551 global ratings

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Top reviews from the United States

JOC
1.0 out of 5 starsVerified Purchase
A good idea in concept, not so great in reality
Reviewed in the United States on December 24, 2018
First, we own/operate a ranch so we have many pieces of equipment that require lubrication (greasing). Most have at least one fitting that is hard to access and often results in a mess because the coupler won''t attach securely. The worst is a snocat we have that has 26... See more
First, we own/operate a ranch so we have many pieces of equipment that require lubrication (greasing). Most have at least one fitting that is hard to access and often results in a mess because the coupler won''t attach securely. The worst is a snocat we have that has 26 grease fittings on the axles and drive train. None of these are easy to access and most are "blind". I had hoped that this lock-on coupler would help decrease the amount of grease not going in the fitting and make securing the coupler a bit easier. I just serviced the snocat and this is what I found: 1) this fitting is larger than a standard coupler, both in length and diameter, and will not work in areas with limited clearance; The handle release adds to this issue; the handle release has a pretty stiff spring, so if your hands are greasy and clearance is limited, it is virtually impossible to hold it open and get the coupler onto the zerk fitting; though the coupler "locks" onto the fitting; if you are working on a "blind" fitting, the face of the coupler is flat, which won''t allow you to feel if you have it over the fitting and the jaws are too stiff to hold open for very long; if it is not on absolutely straight it will leak grease; without a hose swivel (which LockNLube markets, not surprisingly) you will find yourself twisting your grease gun every which way trying to get the coupler open, and sometimes, loose because of the large spring handle. After struggling with it 26 times yesterday I ended up going back to a strong 4-jaw "standard" coupler. I''ll keep it as sometime I might find a use, but overall, it didn''t work at all for me.
216 people found this helpful
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RJC
5.0 out of 5 starsVerified Purchase
Awesome Product
Reviewed in the United States on October 11, 2018
I was tired of pulling out zerk fittings or having trouble getting the end of the grease tip on zerk fittings in awkward spots. So I decided to try this product, and am I happy I did. It works as advertised. Makes greasing my tractor, utv and trailers a breeze. I have seen... See more
I was tired of pulling out zerk fittings or having trouble getting the end of the grease tip on zerk fittings in awkward spots. So I decided to try this product, and am I happy I did. It works as advertised. Makes greasing my tractor, utv and trailers a breeze. I have seen reviews stating that grease got all over the place, this is not the case I had no problems at all. One zerc fitting had a seized ball bearing from dirt and the grease would not inject. I took a pick and some wd 40 sprayed it pushed in the bearing with the pick. Attached the grease hose again and no problem at all. I think many reviews stating grease would not go in the zerc and got all over the place had the same problem. I am going to buy 2 more for my other guns. I am no mechanic and am a casual user I guess, so we will see how it holds up, seems well made. I would highly recommend this item
141 people found this helpful
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Appoli
5.0 out of 5 starsVerified Purchase
Awesome little attachment, definitely worth the $
Reviewed in the United States on August 10, 2017
I bought a pneumatic grease gun for the first time as I had recently installed something with zirc fittings for the first time. Doing a little reading it sounded like pneumatic is the way to go considering the forces that have to be dealt with (I got the cheaper OTC gun... See more
I bought a pneumatic grease gun for the first time as I had recently installed something with zirc fittings for the first time. Doing a little reading it sounded like pneumatic is the way to go considering the forces that have to be dealt with (I got the cheaper OTC gun which seems to be great).

Considering that my car is very cramped (VW Golf R) and that even if the fittings were in an easily accessible area it would probably still be a pain to keep the tool on the fitting...especially at the right angle. In addition the grease can get pricey so I wouldn’t want to spill any for no reason.

As it turns out it isn’t hard to get to the fittings, but keeping linear pressure on them would be a real pain - especially without a lift. This little bad boy makes things amazingly simple, heck for some of the fittings I don’t need to remove any parts - just need to have enough room for the part to fit and you’re golden.

Line the coupler up, press down and lock it onto the fitting. Then you can leave it alone and just operate your gun. It was effective to the point that I wasn’t sure if grease was making its way through until it came out of the bushing. I’ve never done it the old fashioned way, but this seems like it’s worth at least 5-10 min per fitting (for a newbie mechanic working in their garage). That alone justifies the price to me.

I sent this to a couple friends I know - a mechanic and a friend that grew up on a farm (and uses the farm shop to do their work). They both instantly spent the $30 and bought it. To me that validates the price/value.
Combined with the fact that it works as advertised I’d say that this is a great buy. Don’t regret almost doubling the cost of my grease gun for it!
98 people found this helpful
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Gary D
3.0 out of 5 starsVerified Purchase
50% success
Reviewed in the United States on January 22, 2015
Bought two of these. One works exactly as advertised. The other one slips off 50% of the time so grease oozes all over. Both couplers are on identical grease guns - Lincoln 1162. So 5 stars for one, 1 star for the other. Their website has no customer service... See more
Bought two of these. One works exactly as advertised. The other one slips off 50% of the time so grease oozes all over. Both couplers are on identical grease guns - Lincoln 1162. So 5 stars for one, 1 star for the other.
Their website has no customer service department. Only a toll number and an address.
A difficult to find website instruction says to hold the lever forward if it slips off. Doesn''t work with the pressures involved. Plus, their website brag is that it is a one hand operation. Not so if the other hand has to hold the lever.
Now the coupler is supposed to come with extra jaws and a seal for a 25% greater price according to the website.
I''m going to try the toll number to see what happens.

Edit update: Just got off the phone with customer service (I believe it was the owner.) We had a very informative conversation that speaks volumes about the integrity and genuineness of the company. I am very pleased with the results of the conversation and would rate the company as a whole as 5+ stars. I urge anybody that wants this product to feel confident that it will work and, in the rare case of a problem, it will be resolved.
441 people found this helpful
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J W
5.0 out of 5 starsVerified Purchase
WOW Fantastic Tool!
Reviewed in the United States on July 24, 2017
Just received this coupler---WOW is first impression, haven''t even used it yet! Very, very well made, feels solid in the hand and looking at the actual locking mechanism it should be quite the tool to eliminate messes during routine greasing operations. Update:... See more
Just received this coupler---WOW is first impression, haven''t even used it yet! Very, very well made, feels solid in the hand and looking at the actual locking mechanism it should be quite the tool to eliminate messes during routine greasing operations.

Update: Having put this into service I have to agree with myself---great tool! :) In fact its so good I''ve changed a few Zerks to accommodate its longer length, previously I was using a Lincoln-variant that would swivel for tight areas of which I had a few. Changing those Zerks to 90 and 45 degree fittings gives me full and complete access now. Being able to clip it in place gives me two free hands to power the grease fill, not having to hold the filler in place.

It does leave a bit of grease on the end but its no worse than another other filling attachment. Overall I highly recommend this without reservation!
92 people found this helpful
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Isaac
1.0 out of 5 starsVerified Purchase
Gease gets on the machine, not in it!
Reviewed in the United States on August 13, 2018
Took a chance on this and it leaked grease everywhere through the end of the fitting where it locked on. Tried multiple fittings that I know will take grease to make sure it''s not the zerk fitting that is plugged. Nope, it''s the Lock''n Lube that is definitely not sealing... See more
Took a chance on this and it leaked grease everywhere through the end of the fitting where it locked on. Tried multiple fittings that I know will take grease to make sure it''s not the zerk fitting that is plugged. Nope, it''s the Lock''n Lube that is definitely not sealing correctly. Tried to put the spare seal kit and jaws on using the instructions on the package and also tried using a vice and unable to get the defective one off. Wasted way too much time on this. This was an complete waste of my time and money.
61 people found this helpful
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Riley
5.0 out of 5 starsVerified Purchase
Makes work easy
Reviewed in the United States on March 11, 2016
My job description might aswell be greaser, I am a service tech for a city, so I grease everything from some cop cars all the way to full sized garbage trucks (Google lodal garbage trucks) this thing makes life easy, while I''ve found a few fittings that just would not take... See more
My job description might aswell be greaser, I am a service tech for a city, so I grease everything from some cop cars all the way to full sized garbage trucks (Google lodal garbage trucks) this thing makes life easy, while I''ve found a few fittings that just would not take grease, they wouldn''t have accepted grease with or without this fitting, all in all, I will be purchasing more of this product , I would like to see a "mini pistol" version at a 90 deg for even more fittings
134 people found this helpful
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hello
1.0 out of 5 starsVerified Purchase
It does not eliminate leaky grease fittings.
Reviewed in the United States on January 28, 2018
Once this coupler gets dirty it is hard to connect. It has always leaked some grease as it is used. Some fittings are hard to hook up to because of the space required to operate the trigger mechanism. I will not recommend this product or ever buy it again!
40 people found this helpful
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Top reviews from other countries

Alexei
2.0 out of 5 starsVerified Purchase
Didn''t work with tight spaces
Reviewed in Canada on May 2, 2020
This LockNLube grease coupler didn''t work out for me and that''s really unfortunate as I had my hopes really high for it. There were two problems with it: 1) this coupler is larger than a standard grease coupler and Zerk fittings tend to be in some tight spaces and getting...See more
This LockNLube grease coupler didn''t work out for me and that''s really unfortunate as I had my hopes really high for it. There were two problems with it: 1) this coupler is larger than a standard grease coupler and Zerk fittings tend to be in some tight spaces and getting it to lock on properly was a hassle on most of my zerks (more hassle than holding a regular coupler in place for 5-10 pumps) 2) once locked on, it worked well at first but after greasing ~25 zerks and in a few weeks, it''s leaking in applications where it didn''t leak originally unless I really push it into place, which in some cases is impossible due to zerk fitting locations. If you usually work on larger machinery with relatively unobstructed access to zerks then this coupler may do really well, but unfortunately it didn''t work well with zerks in tight spaces
9 people found this helpful
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Jblack
5.0 out of 5 starsVerified Purchase
The Only 1 to buy , skip the rest , Lock n Lube is the only 1 that worked for me !!
Reviewed in Canada on January 18, 2019
I tried 2 other brands of this same product , both name brands & very expensive $$$ , neither 1 of those worked , either leaked grease easily or was so big it wouldn''t fit in recessed , They were quite literally junk ,, But after reading reviews most of the people had exact...See more
I tried 2 other brands of this same product , both name brands & very expensive $$$ , neither 1 of those worked , either leaked grease easily or was so big it wouldn''t fit in recessed , They were quite literally junk ,, But after reading reviews most of the people had exact same issue ,,, But this lock n lube had great reviews on Amazon , So I orderd it , came on time & works exactly as others had reviewed ,, Save your $ , don''t waste your time with anything else ,,, This Lockn lube is terrific , stays on & doesn''t leak , when you take it ff nipple it leaves a lil grease , but far better than normal tip , & it stays locked on & will come off easily under reassure , Love it
11 people found this helpful
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Allan
4.0 out of 5 starsVerified Purchase
Pretty good product
Reviewed in Canada on September 6, 2020
Bought a knock off a year ago, jaws on it broke. So this one was twice the money but you get a second set of jaws with it, so basically the same deal and it''s clearly better quality. It''s also shorter than the other version which makes it easier to get into some spots, but...See more
Bought a knock off a year ago, jaws on it broke. So this one was twice the money but you get a second set of jaws with it, so basically the same deal and it''s clearly better quality. It''s also shorter than the other version which makes it easier to get into some spots, but more difficult to reach others. Overall I''m happy so far, I have a heavy truck and lowbed I grease weekly with a Milwaukee electric grease gun. ***Update after even months of using the coupler about once a week on a lowbed truck and trailer, the inner rubber seal blew out on one side so I hade to use my replacement tip & jaws. I''d like to order another rebuild kit but they aren''t available on Amazon. After shipping and exchange out of the states it''s cheaper to just order another locknlube that comes with a replacement tip.
One person found this helpful
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H1
5.0 out of 5 starsVerified Purchase
The outer sleeve pulls back, so good for tighter spaces
Reviewed in Canada on December 14, 2019
I needed to get into a grease nipple in a tight place. Bought a different style first that was too big. On this one the outer case (sleeve) pulls back to open the jaws so it fits in a smaller space. I put it on a battery powered (Milwaukee) grease gun and it held the...See more
I needed to get into a grease nipple in a tight place. Bought a different style first that was too big. On this one the outer case (sleeve) pulls back to open the jaws so it fits in a smaller space. I put it on a battery powered (Milwaukee) grease gun and it held the pressure and still releases just fine. Very satisfied. Btw, it comes with spare "jaws" and parts so I imagine it''ll last a long time.
4 people found this helpful
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Thaik
5.0 out of 5 starsVerified Purchase
Epiphany: Been pumping grease all wrong!
Reviewed in Canada on June 25, 2020
I''ve seriously been greasing my ball joints all wrong for all these years on my car! This thing makes it so easier you feel dumb for not knowing about this earlier. It''s so seamless, it''s exactly as they say "Grease goes in and not on"! Not a single droplet of wasted...See more
I''ve seriously been greasing my ball joints all wrong for all these years on my car! This thing makes it so easier you feel dumb for not knowing about this earlier. It''s so seamless, it''s exactly as they say "Grease goes in and not on"! Not a single droplet of wasted grease, the jaw just clamps on the zerk fitting with little to no effort, the spring is not hard at all to operate, only one hand is necessary. Clamping off is as easy. I can now comfortably pump grease with both hands on the grease gun without having to worry about applying proper pressure on the fitting.
One person found this helpful
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LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

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LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

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LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

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LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

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LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

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LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

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LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale

LockNLube Grease Gun Coupler locks onto Zerk fittings. Grease goes in, high quality not on the machine. World's best-selling original locking grease coupler. Rated 10,000 PSI. Long-lasting rebuildable sale tool. sale