The ideal combination of power and strength The Professional Cordless GDS 18V-400 Wrench clearly stands out in terms of power and strength compared to medium torque tools. It is a great choice for using M10 and M12 screws. The impact wrench that produces the 400 Nm torque must be strong enough to also tighten the bolts to a maximum size of M20. The product provides even greater resistance because its special ingredients are longer lasting. The Bosch Professional Heavy Duty line of impact wrenches is perfect for use in extremely demanding work environments. Key product features The strongest model among medium torque tools. Ideal for many applications involving rotation. A torque value of 400 Nm should be sufficient to tighten the M20 screws (30 mm nuts). Optimum potency due to longer shelf life of key ingredients. ABR (Auto Bolt Release) assists in tool disassembly by automatically stopping the tool when the nut is unscrewed.