AORRZER Grease Gun Coupler is So Easy to Use Compatible with All Grease Guns and Zerk Fittings 1/8 NPT fits all standard grease guns, mini grease guns.Leak-free Design: Enhanced jaws and premium sealing gaskets prevent leakage even at extreme pressures of 12000 PSI, ensuring long-time service and stable performance. No more wasted grease mess everywhere. Good Springs: The springs perform well and guarantee smooth sliding throughout their entire life cycle. Extended Handle: With extended handle design, Easier to use with one hand，it is more labor-saving when oiling. The fine texture of the handle ensures friction with the palm of your hand and avoids accidental slipping. Easy To Use: The grease tool fitting can be locked and released quickly, easily, and conveniently.