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 tradesFeatures: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 standardFor controlled bi-directional tighteningModels 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 mechanismSturdy, varnished tubular steel construction, with zinc-plated ratchet head and top-grade plastic partsErgonomically shaped plastic handgrip with calibration aidChange-over between N·m main scale and lbf·ft ancillary scale to avoid reading errors when setting the torque wantedWith micrometre scale for main N·m scale for setting interim valuesRelease system triggers a tactile and audible signalErgonomic system for torque adjustment with reference symbolProvision for rapid setting with hexagon allen key, not includedSecured adjusting/setting system