This Makita 18V impact driver features T Mode which prevents the overtightening of screws and fasteners DTD154 Features: T-mode: Tightening mode for self-drilling screw Electronic 3-stage impact power selection (Hard/Medium/Soft) Brushless motor One touch sliding chuck for easy bit installation and removal. LED job light Ergonomic soft grip Electric brake Variable speed control by trigger Forward/reverse rotation Compact overall length Batteries, charger or kitbox are not included Specification: Standard Bolt: M5-M16 High Tensile Bolt: M5-M14 Coarse thread (length): 22 - 125 mm Max Fastening Torque: 175 Nm Vibration: Fastening Bolt: 12.5 m/sec_ Vibration K factor: 1.5 m/sec_ Noise sound pressure: 96 dB(A) Noise sound power: 107 dB(A) Noise K factor: 3 dB(A) Net weight: 1.5 kg Impact Selection: 3 stage + Tek mode Driving Shank: 6.35mm (1/4\") Hex Blows per Minute (Hi) - ipm: 0 - 3800 ipm Blows per Minute (Med) - ipm: 0 - 2600 ipm Blows per Minute (Lo) - ipm: 0 - 1100 ipm Machine Screw: M4-M8 No Load Speed (hard/med/soft): 0-3600 / 2100 / 1100 rpm