This metal coupler with silver color has a locking jaw design and sealing gasket to prevent leakage while locking onto zerk quickly. With a double handle and anti-slips design, it allows easy one-hand operation, making the task less labor-intensive. The coupler is compatible with most grease guns and is perfect for large equipment.Flexible 15-inch spring hose included. 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