High Pressure Grease Gun CouplerEasier and More Precise Greasing! Using a High Pressure Grease Coupler to lubricate a joint or bearing enables better precision, pressure, and flow control in applying the grease and delivering it to areas that would otherwise be difficult to access. Avoid grease leaking, save grease, and save time! Quick Release and Lock The thumb lever design makes coupling and decoupling easier, and it will not pop out under pressure after being locked. It allows