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.

Wow what a great invention i have been bragging this thing up for weeks now! I highly recommend buying this rig

I’ve put off this purchase for a long time because I didn’t think I could justify the cost. Long story short, this was a great purchase.

I purchased this only a few weeks ago and I have used it in several applications Including my work as a heavy equipment operator, on my farm, and also on my vehicles. Id recommend this product to anyone.

I needed a coupler that could survive a modest amount of tug as it was being applied and this does the job fine.

Worked as advertised. I have two old jeeps that have grease fittings that do not like to accept grease and pop off all the time. I used it on both and not once did this thing pop off. I was able to grease all the lube points in short order.

Product is awsome, makes servicing my machines a lot easier

This is the first grease fitting that actually does what it is supposed to do. It locks on the fitting on the equipment and is easily removed. I have ordered a second coupler with the longer shaft. This is a quality piece of equipment I use almost daily.

Works great!

Works great! A little bulky and awkward for some zerks, but locks on and seals nicely even when not perfectly straighr. I have another gun without the locking coupler for tight places.

just what I needed and just as it is said to be