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

Coupler allowed me to finally get grease into fittings that had frozen up over the winter! Regular grease couplers would NOT work!

It works great

Different, it works

Great Product

A bit expensive, but I was wasting so much grease, and this solved the problem. Now I can pump gun with 2 hands. Would buy again.

Works great. And I havent had an issue with clearance so far...

Love it !! So easy to use and I don’t get grease everywhere now.

I was surprised at how well this coupler works. It seals better than a new standard coupler. Less mess and less wasted grease. It also is easier on my hand so I am not sore after lubing the tractor and loader.

Makes it so easy to grease, lock on and dont have to hold it is place.

Poor materials and quality. Spend a little more and get one that works well and will last. Regret my purchase and shame on me for not stepping up in price just a little.