Professional Cordless Impact Wrench 1/2" 400NM - GDS 18V-400 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 stop when nuts are loosen