Wera 400 4mm Hex Plus Torque Indicator Screwdriver

The Wera 400 4mm Hex Plus Torque Indicator Screwdriver is a fixed-torque screwdriver designed for precise, controlled fastening using hexagon sockets. Built around a robust slip clutch mechanism, this torque indicator delivers a clearly audible and tactile signal the moment the set torque value is reached. Once triggered, the clutch prevents any additional torque from being applied, effectively eliminating the risk of over-tightening. A key practical advantage is the significantly higher loosening torque compared to the set tightening torque, meaning no secondary tools are