The makita dtw302 is a cordless brushless 3 8 drive impact wrench powered by an 18v lxt li-ion battery. The variable speed mode can be changed to full speed mode simply by pushing a button. In full speed mode the trigger travel is shorter and the full speed is reached faster. Auto-stop system available both in forward reverse rotation modes. Specifications battery voltage: 18v battery type: lxt li-ion driving shank: 3 8 square, c-ring high tensile bolt: m10-m16 max fastening torque: 300 nm nut busting torque: 500 nm standard bolt: m10-m20 no load speed max hard med soft : 0-3,200 2,600 1,800 1,000 rpm blows per minute max : 0-4,000 ipm blows per minute hi : 0-3,400 ipm blows per minute med : 0-2,600 ipm blows per minute lo : 0-1,800 ipm noise k factor: 3 db a noise sound power: 105 db a noise sound pressure: 94 db a vibration k factor: 2.4 M sec vibration fastening bolt : 15.4 M sec features & benefits auto-stop system brushless motor compact design with a short overall length of 138mm electric brake electronic 4 stage impact power selection ergonomically designed loop handle with rubberised soft grip forward reverse rotation led job light trigger switch with full speed mode variable speed control by trigger contents makita dtw302z 18v lxt cordless brushless 3 8 drive impact wrench belt clip no batteries no charger no case