400 TX Torque-indicator400 TX Torque indicator Wera TORX torque indicator with fixed pre set torque for TORX screws. Tamper proof design; prevents any accidental or unwanted change of torque value. Robust slip clutch generates a clearly audible and tactile trigger that signal's when the set torque is reached, thereby making it impossible to apply any further torque. The loosening torque is significantly higher than the tightening torque, so no additional tools are needed