Chicago Pneumatic® 1/2" Heavy Duty Impact Wrench Dyna Pact clutch provides high torque and fast run-downs. High performance motor maximizes output while minimizing air consumption. Plunger type reverse valve for true one-hand operation. Built-in regulator to match speed and power to the job Applications: Suspension, frame work, engine work, etc. Ultimate Torque: 450 ft.-lbs. Specifications: Square Drive in.: 1/2 Weight lb.: 5-1/2 Length: 7-1/2 Avg. Air Consumption CFM: 4 Air Inlet NPTF in.: 1/4 Working Torque Range ft.-lb.: 25-330 Ultimate Torque @ 90 PSI Forward ft.-lb.: 450 Ultimate Torque @ 90 PSI Reverse ft.-lb.: 450