This locking and sealing grease guns coupler features upgraded jaw design snaps and quality sealing gasket, which can effectively lock zerk and prevent leakage. The ergonomic design with one handle and anti-slip design allows for one-hand operation, freeing both hands to operate the grease guns. It is compatible with most grease guns and suitable for use on various equipment, making it an essential tool for car and equipment repairs. Features 1. Locking and Sealing: Upgrade jaw design snaps and quality sealing gasket, strong enough to lock zerk and prevent leakage, and easy to lock and release. 2. One Hand Operation: One handle with anti-slips design and smooth retraction mechanism allows one-hand operation, which is ergonomic and less labor-intensive. Once locks onto zerk fitting, it stays on and frees both hands to operate the grease guns. 3. One Hand Operation: One handle with anti-slips design and smooth retraction mechanism allows one-hand operation. Which is ergonomic and less labor-intensive. Once locks onto zerk fitting, it stays on and frees both hands to operate the grease guns. 4. Wide Compatible: Our grease guns coupler is compatible with most grease guns, mini grease guns, small grease guns ends, especially suitable for excavators, bulldozers, cars, large equipment in factories, tractors, harvesters, etc. Specification Material: Metal Color: Silver Size: 9 x 1 cm Weight: 140 g Pattern: Single handle, Double handle Package Include: 1x Grease Guns Coupler 1x 15 Inch Spring Flex Hose