Description: Bosch?s Powerful 400Nm Impact Wrench, where Power & Durability Come Together | Most powerful device in the mid torque class | Ideal for various bolting applications | Powerful enough to tighten M20 bolts (30mm nuts) thanks to 400 Nm torque | Improved robustness thanks to higher lifetime of the critical components | Auto Bolt Release (ABR) feature makes disassembling easier by ensuring tool is automatically stopped when nuts are loosened | Technical Data: Battery voltage: 18.0 V | Weight excl. battery: 1.25 kg | Torque, max.: 400 Nm | No-load speed: 0 rpm | Tool holder: 1/2” Square | Breakaway torque, max.: 600 Nm | No-load speed (1st level): 0 rpm | No-load speed (2nd level): 0-0 rpm | No-load speed (3rd level): 0-0 rpm | Impact rate: 0-3,700 bpm | Screw diameter: M 10 ? M 20 | Total vibration values (Tightening screws and nuts of maximum permitted size) | Vibration emission value ah: 10 m/s? | Uncertainty K: 1.5 m/s? | The A-rated noise level of the power tool is typically as follows: Sound pressure level 91.5 dB(A); Sound power level 102.5 dB(A). Uncertainty K= 3 dB.