Grease Coupler Locks Onto Zerk Fittings Grease Goes in 1/8 NPT in not on the Fearure: 1Dual handle is easier to use and it will not damage to the pipe. The nozzle's seal ring is made of conical rubber to ensure that the coupling will not leak, very sealed and durable. 2It works with all grease types - pneumatic, manual and electric. 3Fits 1/8" NPT fitting, all SAE and Metric Zerk coupler fittings. 4 No need to hold while greasing, Lock-on and free up both hands to operate your grease , Easy clip-off.Maximum working pressure of 10,000PSI (690 bar). 5Perfect for continuous use without breakage, leakage, warping or typical wear and tear. Grease goes IN, not ON the machine. No more grease mess everywhere. Ends the waste. Ends the mess. Ends greasing frustration. Fits all Grease Guns - 1/8 NPT fitting. Fits all SAE and Metric Zerk fittings. Simply replace your existing coupler. Pressure locked? No problem. Easily releases from clogged fittings, even at extreme pressures. Specifications: Suitable for all SAE and zerk metric accessories Compatible with all grease tool models Material: metal Package Included: 1X Grease Coupler