Quick & Simple Connection. Proprietary Locking & Quick-Release Mechanism, the Coupler Locks-On and Creates a Leak-Proof Seal. Innovative Design enables Quick Release Coupler to firmly latch onto the Grease Fitting, enabling Hands-Free Greasing. Compact: 2.9 Length x 1.2 Height. Product Features:Integrated Non-Return Valve enables unit to be Disconnected Easily at pressures up to 15,000 PSI (1,034 Bar).Burst Pressure: 22,000 PSIHigh Quality Tool Steel.Hardened 4-Jaws withstands High Pressures without Deformation Integrated 1/8 NPT Connection. Suitable for Use on most Hand, Battery Powered or Air Operated Grease Guns & Bulk Grease Pumps Ergonomic Thumb Lever Design makes Coupling and Uncoupling totally Effortless. No more Tugging or Time Consuming Effort! No more Stuck Couplers - Twisting, Yanking or using a Screwdriver to get it Off Multi-Year Service Life: High-Performance Hydraulic Seal. No Damage to the Seal, after Several Hundred Uses - No need to buy Spares KitsCompatible with all Sizes and forms of Mounts. Fits all SAE and Metric Grease Fittings Compact: 2.9 Length x 1.2 Height. Ideal for Use in Small, Tight Spaces.