1pc Packaged Rubber-Sheathed Double Gear Grease Fitting. Fits For Electric, Manual, Pneumatic Dual Handle Self-Locking Locking Pliers. Non-Leaking & Heat-Resistant. Can Be Used For Lubrication Of Automobiles & Machinery, Ships. Also Known As High-Pressure Grease Fitting, Grease Guns, Couplers, Grease Pumps.