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.

Easy to use, very clean as advertised, would recommend, and repurchase again!

Works so much easier and faster than the old school screw locks!

It locks on solid and there is no leak by and comes with extra seal was worth it

This is a great accessory - easy to install, works great! It clips on to the zerk fitting with a gorilla grip, keeps the grease going through the zerk rather than spewing out anywhere, and is very easy to release. Where has this been the last 20 years! The only downside is that its bigger than a regular coupler, so it wont fit everyplace - but still well worth it.

Love how this works. It grips the zerk and doesn’t leak!

fits on standard grease gun hoses

After the first use, I ordered a second one and will order one for every grease gun I own. Cuts effort and time down to a small fraction. Now I keep mower spindles, tractors and machines greased the way I should.

Great product

Very easy to use. No more fighting to get the gun off of the grease fitting. My only complaint is that it is too large to get to some fittings. Maybe come up with a 45 degree version or a swivel head

This thing is seriously great! I can get all the hard to reach fittings on my machines without having to hold it on. Just attach it and s*** back and pump grease. No leaks at all, even on those stubborn fittings that always gave me problems. Been using it for about a month now and I seriously dont know how I lived without it.