ACA1431-2. 800 ft-lbs of torque. 9000 RPM creating 1600 impacts per minute. Triple heat treated Ni-Cr-Mo Alloy Steel Hammer Mechanism and Anvil for durability. Forward/Reverse and Power Management utilize a cross bolt mechanism located on back of tool. Grey Pneumatic Flip Socket size 19mm/21mm included. Ergonomic AIRCAT Grip for Comfort. 2 Year Warranty.