Life time warranty
One Hand Operation
Grease gun coupler fits most grease guns and accessories. Can be used with hand or pneumatic guns.
Extreme grease coupler, does not drip, up to 10,000 PSI
No more fighting to get the coupler on or off. It is as simple as pushing it on to connect, and pulling the sleeve back to release, much like a hydraulic quick disconnect.
Fits most all grease guns, 1/8 pipe connection, and will fit most grease zerks. Imperial, metric, JIC, etc. 
Built in valve allows you to remove coupler when there is too much pressure cause by clogged zerk.
Tip is 5/8 diameter to fit tighter areas.