Use: Controlled screw tightening in the range from 250 - 850 N·m / 185 - 630 lbf·ft, Adjustable, releasing and sturdy tubular torque wrench with integrated ratchet and with square drive for industry and the trades, 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, For controlled bi-directional tightening, Models DMK: 1/2" mushroom head interchangeable square with push-button releasing and a ball-locking mechanism. From Model No. DMK 400 with 3/4" push-through square and a pin-locking mechanism, Sturdy, varnished tubular steel construction, with zinc-plated ratchet head and top-grade plastic parts, Ergonomically shaped plastic handgrip with calibration aid, Change-over between N·m main scale and lbf·ft ancillary scale to avoid reading errors when setting the torque wanted, With micrometre scale for main N·m scale for setting interim values, Release system triggers a tactile and audible signal, Ergonomic system for torque adjustment with reference symbol, Provision for rapid setting with hexagon allen key, not included, Secured adjusting/setting system