Electric torque wrench 1/4 for socket wrenches, with variable adjustable torque limitation. When working on live parts, the safety of the user is the top priority. Especially for bolting connections on busbars in distribution boxes, electricians are well-equipped with the insulated torque wrench featuring a 10° switch angle. The torque wrench with right/left rotation is therefore ideal for powerful yet controlled tightening. By pulling out and turning the end of the handle, the required torque value can be manually set according to the numerical scale. Furthermore, the socket wrenches attached to the 1/4 square drive provide a secure hold thanks to the ball lock. When tightening with sensitivity, the torque mechanism in the wrench noticeably gives way upon reaching the set torque value. The insulated torque wrench is subjected to a piece test according to the international standard EN/IEC 60900, allowing for safe work on live parts up to 1,000 V AC.