Controlled tightening of screws in the common range of 250-850 N-m / 185-630 lbf-ft (guidelines for screws M7-10.9 to M24-8.8, M30-5.6). Adjustable, releasing, and robust pipe torque wrench with integrated ratchet mechanism and square drive for industry and trade. Classified according to DIN EN ISO 6789:2003 Type II Class A, with a traceable factory certificate. Calibrated with an allowable deviation of +/- 3% or better. The specification of the standard (+/- 4%) is exceeded for your safety. For controlled tightening in both clockwise and counterclockwise directions. 3/4" through-square drive with pin lock. Robust, satin chrome-plated pipe steel construction, with chrome-plated ratchet and high-quality plastic parts. Ergonomically shaped 2-component plastic handle with calibration aid. Switching between the main scale N-m and the secondary scale lbf-ft to avoid reading errors when setting the desired torque. With micrometer scale for the main scale N-m for setting intermediate values. The release system produces a tactile and acoustic release signal. Ergonomic torque adjustment system with information symbol. Quick adjustment capability with an offset screwdriver, not included. Patent pending. An absolutely audible and tactile release signal is generated by the backlash system. Protected adjustment system.