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.

Works as advertised.

This is an outstanding product. I use a grease gun daily for commercial use with equipment and have struggled for the past couple years with grease not properly going into fittings. The LockNLube has made my job so much easier. I no longer get stressed when greasing my equipment. I would recommend LockNLube to absolutely anyone with a grease gun. I actually look forward to greasing thanks to LuckNLube

The reviews on this thing are outstanding but I must have gotten a dud. The sleeve will not move back over the zerk claws and I have to do it by hand. Not happy especially with grease on the sleeve making it difficult to slide down on the zerk. If the sleeve is not perfectly pushed to the bottom claws to lock it in, by hand by the way, grease flows outside the zerk...not in it. Not happy with this. Now that its got grease all over it, I dont want to send it back so I guess Im stuck with it. Bummer... UPDATE, amazon accepted my return so well see how that pans out. 2nd update: Amazon accepted my return. Thank you!!!

Absolutely no cons! I wish Id bought it earlier.

It works with no LEAKS

Easy to use and works great.!!

Works great.

Its Great!

I was having trouble getting my grease gun to fit on and get off, so I bought this. Wow, what a difference.

Never had the pleasure of using one of these until I bought one, its a definite upgrade for anyone needing to grease equipment frequently.