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. Hand Operation: handle with anti-ips design and smooth retraction mechanism allows -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. Hand Operation: handle with anti-ips design and smooth retraction mechanism allows -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 Compale: Our grease guns coupler is compale 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