LOCK AND SEAL - Grease gun coupler jaw design makes it easier to open and close the grease fitting, reinforced jaws and high-quality sealing gaskets ensure long-lasting and stable performance, no leaks even at 17,000 PSI extreme pressure. High Quality - Made of high-quality refined iron, it can perform all-weather indoors and outdoors, stable and reliable. One-Handed Operation - Double handle anti-slip design and smooth retract mechanism allow for one-handed operation, easy to install/remove. Once locked onto the grease gun accessory, it stays open and frees both hands to operate the grease gun. WIDE APPLICATIONS - Compatible with 14mm standard, micro, battery, pneumatic, manual grease guns and fittings, it also fits M6/M8/M10/M12/M14 grease fittings, just replace your existing grease gun coupler. Colour:Chrome Material:iron Package Contents: 4 x Grease Nipples Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.