Description:1. Easily lock the recessed grease fitting and loosen it with the thumb lever. 2. Unique design. Lockedinsisted no leaks 3. Four hardened spring steel jaws are elastic under high pressure 4. Grease enters, not on the machine. No oil was wasted everywhere. 5. Suitable for all standard grease guns - 1/8" NPT fittings. Suitable for all SAE and metric Zerk fittings. 6. The double handle is easier to use and will not damage the pipe. The nozzle seal is made of tapered rubber to ensure that the coupling does not leak, is very sealed and durable. 7. Suitable for continuous use without damage, leakage, warpage or typical wear.Specification:Product size: 12*7*2.5cm Quantity: 1 piece Color: silver Package Included: 1X grease gun coupler