Features 1. Locking and sealing: Upgraded jaw design with snap function and high quality sealing gasket, strong enough to lock the grease nipple and prevent leakage, and easy to lock and release. 2. One-handed operation: A handle with non-slip design and smooth retracting mechanism enables one-handed operation, which is ergonomic and less labor-intensive. Once locked onto the grease nipple, it stays put, freeing both hands to operate the grease guns. 3. One-handed operation: A handle with non-slip design and smooth retraction mechanism enables one-handed operation. Which is ergonomic and less labor-intensive. Once locked onto the grease nipple, it stays put, freeing both hands to operate the grease guns. 4. Wide compatibility: Our grease gun coupling is compatible with most grease guns, mini grease guns, small grease gun ends, especially suitable for excavators, bulldozers, cars, large equipment in factories, tractors, combines, etc. Specification Material: Metal Color: Silver Size: 9 x 1 cm Weight: 140 g Pattern: Single handle, Double handle Package includes: 1x Grease gun coupling 1x 15 inch spring flex hose