Features1. 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.SpecificationMaterial: MetalColor: SilverSize: 9 x 1 cmWeight: 140 gPattern: Single handle, Double handlePackage Include:1x Grease Guns Coupler1x 15 Inch Spring Flex Hose