For casing up to 21 inches, here's a tong that has strong torquing ability and will handle pipe sizes down to 7 inch. The tong utilizes a two-speed motor and a two-speed gear train, allowing the operator to correctly adjust the tong for the optimum torque and RPM needed for the current application. Maximum torque for the 21 Hydra-Shift is 60,000 ft-lb.