Use: Controlled screw tightening in the range of 1 - 5 N · m, Serial / production-line, Extremely long-term work, Features: Pre-set production torque wrench - without scale, 1/4", 3/8" or 1/2" square drive with ball locking device, With integrated ratchet-function for controlled clockwise tightening, Working accuracy: +/- 6 % tolerance of set torque, Ac