Stanley Proto J7099A 13 Piece 3/8" Drive Hand Impact Driver Set Set Includes: Driver, 10 Bits, 2 Bit Holders and Case Designed to loosen hard to turn bolts and nuts Hand impact driver has heavy-duty spring for added torque The TorquePlus design allows for quick and easy socket engagement to the fastener flats, not the corners Popular interchangeable bits are packaged in plastic blowmolded box for easy storage