Makita DTD171Z 18v LXT 4-Speed Brushless Impact Driver Body Only The DTD171 model is Makita\'s high-end cordless impact driver powered by 18v LXT Li-ion battery (batteries sold separately). It has 4x assist mode settings: Wood mode, T-mode for thick metal plate, T-mode for thin metal plate and Bolt Mode. FEATURES Electronic 4-stage impact power selection + 4x assist modes Quick mode switching function with memory function Brushless motor Electric brake Variable speed control by trigger Forward / reverse rotation LED job light Ergonomically designed high comfort grip One touch sliding chuck for easy bit installation and removal SPECIFICATION Voltage: 18v Battery Type: Lithium-ion Standard Bolt: M5 - M16 High Tensile Bolt: M5 - M14 Machine Screw: M4 - M8 Coarse Thread (Length): 22 - 125 mm Max Fastening Torque: 180 Nm Max Blows per Minute: 0 - 3800 ipm No Load Speed (Max/Hard/Med/Soft): 0- 3600 / 3200 / 2100 /1100 rpm Impact Selection: 4 stage + Tek Mode (x2) + Assist Mode (x2) Driving Shank: 6.35 mm (1/4\") Hex Blows per Minute (Hi/Med/Lo): 0 - 3600 / 2600 / 1100 ipm Net Weight: 1.2 - 1.6 kg NOISE & VIBRATION Vibration Fastening Bolt: 13.5 m/sec² Vibration K Factor: 1.5 m/sec² Noise Sound Pressure: 97 dB(A) Noise Sound Power: 108 dB(A) Noise K Factor: 3 dB(A)