... , hydraulic workover rig is the most dynamic clamp a lightweight tubing clamp. This product has the following characteristics: 1, the first ... diameter of 2 3/8" , 2 7/8" " , 3 ½" two tubing thread, do not replace any parts, cards bear reliable performance ... , adjustment of supply pressure, can be of various grades of steel tubing required deduction on the best torque. Hydraulic Power clamp