Simply press the level to lock and release the grease coupler, it saves lots of time compared to the traditional coupler.

• Lock and Seal up to 14,000 PSI - Reinforced jaws and quality sealing gasket ensure long-lasting and stable performance, and prevent leakage even at 12,000 PSI extreme pressure.
• Robust Build Quality - Built with premium quality Zinc Coated Alloy Steel for all-day performance in the shop or garage, heavier and stronger than any other grease couplers on the market.
• One Hand Operation - Smooth retraction mechanism allows one-hand operation. Once the grease coupler is locked on zerk fitting, it stays on and frees both hands to operate the grease gun.
• Unique Design Help Locating Zerk Fittings in Dark - The unique and patented Retract Mechanism pulls back the inner seal and leaves the outer socket ring wide open, which helps locate zerk fittings at the blind spot.
• Compatible with All Grease Guns and Zerk Fittings - 1/8 NPT fits all standard grease guns and mini grease guns. It also fits all DIN and SAE grease fittings, simply replace your existing grease gun couplers.