Hydraulic Impact Wrench Variable Torque, 7.80 in L, 3.10 in W. Industry exclusive dual torque selector spool to switch between 200 and 515 ft-lb torque settings. 7/16" tri-ball quick chuck for fast changing of bits, sockets, etc. Cartridge style vales for greater accuracy and economical servicing. Dual spool operation allows for use in Open or Closed central hydraulic systems.