Specifications Maximum Torque: 500 Nm Battery Type: Lithium-ion （BL1830, BL1830B, BL1840, BL1840B, BL1850, BL1850B, BL1860B） Body only machine: 1 Voltage: 18V Driving Shank: 1/2" Square Standard Bolt: M10-M16 High Tensile Bolt: M10-M16 Noise sound pressure: 96 dB(A) Noise sound power: 107 dB(A) Noise K factor: 3 dB(A) Rated impact rate:0-3200rpm No-load spped:0-3200r/min Bolt Diameter: 42mm Vibration: Fastening Bolt 11.5 m/sec2 Vibration K factor: 1.5 m/sec2 Net weight: 1.5kg.