Review on 💧 Silver Heavy-Duty Quick Release Grease Coupler - Lumax LX-1403, 1/8" NPT, 1 Pack. Integrated Non-Return Valve for Easy Disconnection at 15,000 PSI Pressure. by James Dominick

Caution: This product is virtually useless for any mirror attachment that requires pressure. Tried on several fittings on a tractor and a bulldozer. Almost all fittings just leaked grease and made a mess. The bulldozer's metric fittings were very poor and the grease just ran all over the fitting. I screwed the grease fittings onto the 5000 psi gauge. Weighing only 600 pounds, this product started leaking badly. The 30 year old port on my Lincoln pistol read 5,000psi and didn't leak a drop. It snaps onto the fitting and stays on, but it's useless if the grease is leaking all over the place.