Torque wrench standard manual with fixed QR ratchet mechanism, No. 721QR/20 QUICK 40-200 N-m square drive 1/2". Lightning-fast adjustment through an easy-to-use clamping lever on the handle. Ergonomically shaped, non-slip adjustment element with thumb recess. Integrated magnifying glass in the reading window. Optimized ball grip for fatigue-free working. Double stop signal. Dual scale N-m/ft-lb. No need to reset to "0" as the measuring element is only loaded during the tightening process. Continued loading after loosening or loads in the opposite direction to the functional direction, e.g., with stuck screws, do not affect the release mechanism, thus protecting it from damage. Protection of all sensitive parts by the robust tubular steel housing. Calibration with the perfectControl calibration device No. 7794 or calibration system No. 7706. Readjustment possible without disassembly if necessary. Display deviation ± 4%. Comes with certificate.