4mm VDE Insulated Hex Torque Indicator, 5 Nm - 400 i Hex - 

Wera VDE torque indicator with fixed torque for hexagon socket screws. Tamper proof. The robust slip clutch generates a clearly audible and tactile trigger that signals when the set torque is reached, making it impossible to apply any further torque. The loosening torque value is significantly higher than the set tightening torque, therefore no additional tools are needed for loosening screw connections. The shape of the handle perfectly fills the whole hand and fingers comfortably lie in the softly rounded recessed grips. This ensures optimal, ergonomic power transfer. Individually tested tool as per IEC 60900 at 10,000V for safe working at the approved voltage of 1,000V.