The torque wrenches have been developed for working on live components. In contrast to conventional VDE torque wrenches, which cannot be disassembled and reassembled due to their sheathing, the 5108 VDE and 5109 VDE can be readjusted and recalibrated. The interchangeable square drive enables both right and left tightening. The achievement of the set torque value is signalled palpably with a close-gap release and audibly with a “click” sound.