The SP Air 3/4" Heavy Duty Impact Wrench, No. SP-1158, can handle tasks like spring work, pinion nut and truck pad removal and engine teardowns, according to the company. The single-dog clutch mechanism delivers up to 1,200 ft/lbs of torque. The specially designed regulator system allows users to adjust power output in one direction, while maintaining full power in the opposite direction. The handle air exhaust directs air flow away from work and reduces noise level.