Controlled bolt tightening in the most common range of 40-200 N-m / 30-150 lbf-ft (guide value bolts M7-10.9 to M20-6.9). Adjustable, releasable, and robust pipe torque spanner with rectangular mounting for industry and handicraft. Classified according to DIN EN ISO 6789:2003 Type II Class A, with a traceable works certificate. Calibrated to a permissible deviation of +/- 3 % and better. The specification of the standard (+/- 4 %) is exceeded for your safety. For controlled right and left hand tightening. Rugged, satin chrome plated tubular steel construction, with chrome plated rectangular fixture (14x18 mm) and high quality plastic parts. Ergonomically shaped, 2-component plastic handle with calibration aid. Switch between main scale N-m and secondary scale lbf-ft to avoid reading errors when setting the desired torque. With micrometer scale for N-m main scale for setting intermediate scale values. Breakaway system generates a tactile and audible trigger signal. Ergonomic system for torque adjustment with indication symbol. Possibility of quick adjustment by offset screwdriver, not included in delivery. Secured adjustment system. Factory calibration gauge: 25 mm (14x18). Operation only with insertion tools with uniform stitch size - otherwise there may be shifts in value. Depending on tool use, both forward (e.g. insertion spanner) and backward (e.g. spanner) operation is possible (e.g. open-end spanner) or to the side (e.g. reversible ratchet and socket spanner). Patent pending.