The Makita DTW450 1/2in Impact Wrench has a compact, lightweight design and a powerful 4 pole motor. Fitted with a forward and reverse rocker switch trigger. The body features rubber joint construction for minimum battery failure. Fitted with an ergonomic soft grip, ideal for prolonged use and less user fatigue. There is also an LED job light with afterglow for working in dark spaces. Comes as a Bare Unit, No Battery or Charger Specification Bit Holder: 1/2in Square No Load Speed: 1,600/min. Impact Rate: 2,200/bpm Max. Torque: 440Nm Weight: 3.4kg All vibration figures quoted are Tri-axial to EN60745 2006. Noise Sound Pressure: 94 dB(A). Noise Sound Power: 105 dB(A). Noise K Factor: 3 dB(A). Vibration: Fastening Bolt: 19 m/sec². Vibration K Factor: 1.5 m/sec².