This tool is the strongest 1/2 inch impact on the market with over 1200 foot pounds of nut loosening power while weighing only 4.4 lbs. The composite housing with aluminum back cap along with a thermo-plastic rubber injected grip makes the tool super durable and comfortable. The air motor design holds up in dirty conditions better than all other composite competitors. Quiet handle exhaust, Twin hammer mechanism, full teasing ergonomically developed trigger, swivel air inlet, free speed 8,200, working torque: 75-580, max torque: 922 ft lbs, super great value and sure to please even the most demanding operator.