LockNLube Grease Gun Coupler, locks on, doesn't leak, rated over 10,000 PSI

LockNLube® Grease Coupler. End greasing frustration with the LockNLube® Grease Coupler. It is the ultimate solution for leak-free greasing. Compatible with all grease guns and grease fittings, it locks on, stays on, and will not pop off under pressure.