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 6789:2017 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 · 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 readin