Use this tool for assembly work of automobiles, garages or shipbuilding. Weighing only 3.7 pounds and having a no load speed of 0-2200 rpm, the WH12DH is light and fast. The rare earth magnetic motor is an essential high performance feature. This tool possesses an impact drive fastening system that prevents damage to the screw head after fastening has been completed. The rigid die-cast aluminum gear housing provides durability and helps dissipate heat.