Grease Coupler 3-Jaw, For Use With Hand Operated Grease Guns, Size 19/32 in, Connection 1/8 FNPT, Max. Pressure 6,000 psi, Min. Burst Pressure 6,000 psi, Working Pressure 6,000 psi, Material Steel, Features Steel Jaws and Heat Treated Coupler Body to Withstand High Pressure Without Deformation, Includes (4) Jaws