Description: 【Locking and Sealing】: Grease 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. 【Premium Material】: Built with premium quality steel for all day performance in the indoor and outdoor, stable and reliable. 【 Hand Operation】: Double handle with anti slip design and smooth retraction mechanism allows hand operation, easy installation/removal. Once locks onto fitting, it stays on and frees both hands to operate the grease . 【Wide Application】: for 1/8" NPT standard, mini, battery, pneumatic, manual Grease Fittings, it also fits all SAE grease fittings, simply replace your existing grease couplers. 【Improved Design】: Improve the design, press the operation and avoid axial bending. The longer version makes the design more meaningful Easy installation. The improved jaws have long term stable and durable performance without oil leakage. Specification: Material: Steel  Size Chart: 9cmx6cm/3.54inchx2.36inch Package Includes: 1 Grease Coupler(4 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.