Use: Controlled screw tightening in the range from 6 - 30 N·m / 50 - 270 lbf·in, Features: Classified according to DIN EN ISO 6789-2:2017 Type II Class A, incl. traceable test certificate, calibrated to a maximum permissible deviation of +/- 3 % and thus more precise than the +/- 4 % required by the standard, 1/4" square drive with ball locking device a