ACA1992. 1800 ft-lbs of torque at 5000 RPM producing 1600 impacts per minute. Pinless Hammer Mechanism. Triple heat treated Ni-Cr-Mo Alloy Steel for durability. Enlarged D handle can be located on either side of tool. Combined F/R and Power Management Switch. The anvil has both Friction Ring and Through Hole Socket Retainer. Designed for semi-truck wheels and other large wheels. 2 Year AIRCAT Warranty.