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.

It has very tight tolerances but Im ok with that. It is so nice to let go and use two hands on the grease gun instead of trying to find a place to lever the grease gun with one hand. Pretty bulky. I know Ill have to switch tips at times.

I have a grease gun with a 10,000 psi pressure gauge. This fitting holds at 10,000 psi as long as it is properly locked. If it is not fully locked it leaks. Have freed several plugged fittings. However, those old assemblies that have been standing full of dirt for years wont budge at 10,000 psi. They need to be disassembled and cleaned. As a general use fitting on my regular grease gun it stays attached to the zerk which helps eliminate those big blobs of grease that used to follow my grease gun everywhere. Saves a lot of grease. Worth the price for me.

Now I dont have to RIP out zirc fittings when I pull it off.

I like the locknlube it easy to use and i would buy again

Very easy to use! I highly recommend this product to anyone that owns a grease gun!!!

Works as advertised

Great quality, works as advertised. Comes with a spare set of jaws.

Locks tight, no leaks so far. Appears to work well.

like that it stays locked on

works well but it sometimes doesnt fit in tight places.