Wera - 400 i VDE Hex Insulated torque-indicatorKey Features Insulated, individually tested VDE T handle torque indicator for safe working up to 1,000V T handle is ideal for transferring controlled tightening torque and high loosening torque Error free screwdriving due to non slip friction clutch and exact torque transmission Distinctly audible and noticeable excess load signal when the pre set torque is reached. Tamper proof against accidental changing of set torque value Product Description Wera