Use: • Controlled screw tightening in the most common range of 20 - 850 N·m / 15 - 630 lbf·ft (guide for screws M7-10.9 to M24-8.8, M30-5.6) • Adjustable, releasing and sturdy tubular torque wrench with integrated ratchet and with square drive for industry and the trades Features: • Classified to DIN EN ISO 6789:2003 Type II Class A, with a factory certificate allowing for operations to be traced back. Calibrated to a permitted +/- 3 % deviation and better. The specifications of the standard (+/- 4 %) are exceeded. • For controlled bi-directional tightening. DMUK only for controlled clockwise-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 grip 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