The Batavia MAXXPACK Impact Driver provides effortless driving of both long and large screws. Metered electronic speed control and kickback protection enable you work quickly and safely. The ergonomic soft grip provides comfortable working. Fitted with a universal hexagonal bit holder. Comes as a Bare Unit, No Battery or Charger. Specifications: Bit Holder 6.35mm (1/4in).No Load Speed: 2,200/min.Impact Rate: 3,000/bpm.Max. Torque: 150Nm.Weight: 2.2kg.