Rotation Control: Combined forward/reverse and power management switch, 6-stage settings to adjust speed and torque to adapt to different applications. Rugged and Robust: This air impact gun equipped with an advanced pin-less clutch mechanism and high-strength casings that can perform stable and high torque with excellent durability to withstand heavy use. All for Heavy Duty Use: Tightening and loosening bolts, lug nuts and rusted fasteners for agriculture machine, truck, boat, structure and other industries applications for heavy machinery owners and professinal mechanics. Easy Operation: Lightweight aluminum body, enlarged "D" shaped handle cavity and rubber anti-slip strip provide better control and more comfortable operation, and long 8" long anvil for harder to reach areas where clearance is limited. Beast Performance: Deliver up to 4950 footpounds high torque output and the breakaway torque even reaches 5175 ftlbs more powerful air impact wrench to tackles heavy duty vehicle applications like heavy truck, bus, and tractor tires., Manufacturer: QAXRZCUCD