The Zipp Air Tool 1/2" Twin Hammer Impact Wrench, No. ZIW4510, provides 1,000 ft/lbs of working torque. With three stages of adjustable speed for forward and reverse operation, the impact can be used for both automotive and heavy truck repair. The twin-hammer design and hot forged alloy steel hammer cage and anvil create more torque and three-times longer life span than traditional design. The 5.7-lb tool offers a free speed of 7,200 rpm and an average air consumption of 8.12 cfm.