Features 1. Locking and Sealing: Upgraded jaw design with secure snap and high-quality sealing gasket provides strong locking on zerk fittings and helps prevent leakage. Easy to lock and release. 2. One-Hand Operation: Single handle with anti-slip design and smooth retraction mechanism allows one-hand operation, offering ergonomic comfort and reduced effort. Once attached to a zerk fitting, it stays securely in place, freeing both hands to operate the grease gun. 3. One-Hand Operation: Single handle with anti-slip design and smooth retraction mechanism enables easy one-hand use. Ergonomic design reduces user fatigue. Securely attaches to zerk fittings, allowing hands-free operation during greasing. 4. Wide Compatibility: Compatible with most standard grease guns, mini grease guns, and small grease gun fittings. Ideal for use with excavators, bulldozers, cars, factory machinery, tractors, harvesters, and other heavy equipment. Specification Material: Metal Color: Silver Size: 9 x 1 cm Weight: 140 g Pattern: Single handle, Double handle Package Includes: 1 x Grease Gun Coupler 1 x 15 Inch Spring Flex Hose