Posted 5/13/2015 07:22 (#4567302 - in reply to #4566672) Subject: RE: Lock n lube grease coupler
I bought a couple but have only used one so far. It works great. My brother complained of it popping off the zerks if a zerk requires high pressure but when I used it I found you just need to ensure the outer piece of the coupler is slid all the way forward. If you do that it seals well and I could not make it pop off under any amount of pressure.