Description 6" C-Clamp - Heavy Duty | Case of 10 | JETSave Big when you buy case lot 10 per case. Only $87.56 per EACH!. Industrial quality drop forged heat treated steel C-clamps Heavy duty swivel pads are secured by a special retaining clip that is superior to crimped pads Acme threaded screw for smooth operation and even clamping pressure Black oxide screw resists welding spatter Clamping Pressure: 7,650 lb Max. Opening: 6-1/4" Throat Depth: 2-1/2"