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.

Very easy to attach and remove, stays engaged with having to muscle it. Great product.

These hold on to the grease fitting, easy on easy off. Grease goes in not all over...

Best attachment for your grease gun ever made. Whoever invented this tip was a genius. Getting grease runout, or grease all over your hands while trying to lubricate your car/truck/tractor, or wherever you have zerks that take grease, is no fun. I have a couple of grease guns and bought one for each. I recommend this attachment.,

Works GREAT!

No more grease nipple slipping! Pop it on, and spread that grease Works great. Buy it!

Lock and lube is the best thing to happen to grease gun since their invention. Lock it on and grease doesnt go everywhere.

Easy to use locks in and u done!! Dummy proof

I have always hated my grease gun. Got a new one, same problem. Added this to it, problem solved. No morenleaky grease mess left over. It is a little big but it has worked for me so far! Very happy.

This product works just as described. Easy to lock onto the grease nipple. Releasing the coupler couldn’t be easier. I highly recommend this product.

it did a great job..just remember to unclip to move or it will take off a fitting