We are offering butterfly impact wrench.. 38a square drive. single hammer clutch. brass air inlet swivel 360. operating air pressure of 90psi. maximum torque (reverse): 90 ft-lb. free speed: 10, 000 rpm. average air consumption: 3 cfm. overall length: 140mm. air inlet: 14npt. air hose id: 38 (10mm). anvil size: 38 (10mm). weight: 1.0kg