Wera Series 7400 Kraftform ESD adjustable torque screwdrivers designed for torque controlled tightening to guarantee the safety of the screw connection. Offering measurement accuracy at +/- 6% in accordance with EN ISO 6789. Wera torque tools have unlimited loosening torque to loosen seized screws. Ergonomic Kraftform handle, with hard and soft zones, that fit the shape to the hand for the ultimate in comfort and high-speed torque transfer. Quick-release chuck with one hand technology. Easy torque adjustment without special tools. Multi-component Kraftform handle fits the shape to the hand erasing the physical stresses of screwdriving.