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.

Bought to use with my 18v Ryobi grease gun for maintenance on our tractor. 100% happy, and the install is easy, but best if you have a vise to work on.

This little gadget seems to work very well. I have used it only a few times so far, but it clamps on easily and holds firmly.

Well made and much easier to use then a standard grease gun end. Even came with spare parts but I think you would have to be using this thing in an industrial application on a 24hr basis to wear anything out.

Having owned plenty of tractors and equipment in my lifetime, Ive always been frustrated with certain grease fittings on various equipment. The LockNLube coupler is just awesome as it works just as described. I was concerned that the overall diameter of the coupler would be much larger than a standard couple and be hard to get on fittings in tight places, but that is not the case. I measured it to be only 1mm larger. Slips on the zerks very easily and stays put on the fitting. It is so nice to be able to not have to hold the gun coupler on the fitting while greasing.

If you grease anything, get this immediately. Amazon price is high though. I grease a bobcat, tractor and trailer. It takes me half the time. Powers through clogged zerks without too much problem

Perfect tool for the job

Product is awsome, makes servicing my machines a lot easier

after being in business for many years i have never seen anything like this. The first time i saw this unit with 2 minutes I found it on amazon and ordered 2.

Does what it says it does. Works great but in tight places like my mower tail wheels. Can’t get it in because of its length. I think they make a right angle adapter for this type of spot.

Works great, the down side is the length of the coupler which hinders you from reaching fittings in tight locations.