Features LOCKING AND SEALING - Grease gun coupler 6 jaw design snaps on and off grease fittings easier, reinforced jaws and quality sealing gasket ensure long lasting and stable performance, does not leak even at 10,000 PSI extreme pressure HIGH QUALITY - Built with premium quality Zinc Coated Alloy Steel for all-day performance in the indoor and outdoor, stable and reliable ONE HAND OPERATION - Double handle with anti-slip design and smooth retraction mechanism allows one-hand operation, easy installation/removal. Once locks onto zerk fitting, it stays on and frees both hands to operate the grease gun WIDE APPLICATION - Compatible with All 1/8" NPT standard, mini, battery, pneumatic, manual Grease Guns and Zerk Fittings, it also fits all DIN and SAE grease fittings, simply replace your existing grease gun couplers Specifications Reinforced 6 Jaws Double Handle with Anti-slip Design Rated 10,000 PSI Working Pressure Fits All Grease Guns - 1/8 NPT fitting