The Black Diamond Professional Quick Connect Locking Coupler makes it easy to connect and disconnect quickly for faster, cleaner greasing. When the thumb lever is actuated, the engagement system moves inside the steel wall to add back support to the mechanism for a more secure lock. Its universal design works across common grease fitting profiles (SAE, DIN, BS, and more) with 6-point engagement and hardened ball contact points that resist deformation for longer life. A slim-line body improves access in tight areas, with a 1/8" NPT thread and an 8,000 psi working pressure.