Wera Tools - Safe-Torque A 1 torque wrench with 1/4" square head drive, 2-12 NmTorque wrench with slide over mechanism. Once the set torque has been reached, the tool cannot be overtightened, so that excessive torque cannot be applied. Setting range of 2 to 12 Nm for controlled clockwise and counterclockwise torque operation. Easy setting and saving of the default value: The audible and tactile clicks on reaching the scale values facilitate the safe setting of the desired torque value. With Torque Lock function for use as a