This Metabo SSW 18 LTX 400 BL Brushless Impact Wrench is a high torque machine with low kickback torque. The unique Metabo brushless motor provides quick work progress and the highest efficiency for any application. Overload protection protects the motor from overheating. Its robust die-cast aluminium gear housing provides optimum heat dissipation and durability. With 12-speed/torque levels for a wide range of applications. There is also an integrated work light for illumination of the work area and a handy belt hook can be fixed either on the right or left side. Ultra-M technology: highest performance, gentle charging and 3-years of warranty on the battery pack. Bare Unit - No Battery or Charger supplied. Specification: Bit Holder: 1/2in Male Square No Load Speed: 0-2,150/min. Impact Rate: 4,250/bpm Max. Torque: 400Nm, 12 Settings Max. Loosening Torque: 620Nm Max. Bolt Diameter: M20