Grease Gun Holder For Use With Hand Operated Grease Guns Size 2 1/4 in OD Connection 2-1/4 in Max Pressure 10 000 psi Min Burst Pressure 82 000 psi Working Pressure 10 000 psi Material Steel Features Holds Grease and Suction Guns with 2 1/4 in OD Barrel Mount to Any Surface Includes Plastic Clamp