A three piece set of calibrated torque wrenches with hard wearing Chromium Molybdenum steel drive gear. 1/4", 3/8" and 1/2" drives are included all with dual scale (NM & FT-LB).    Contents: 1/4" drive torque wrench - range of 2-24 NM (1.5-17.7 FT-LB). 3/8" drive torque wrench - range of 10-140 NM (7.4-103.2 FT-LB). 1/2" drive torque wrench - range of 20-230NM (14.7-169.5 FT-LB).    They all have a calibration tolerance of ± 4% in accordance with DIN ISO 6789-1:2017. The contrast marking of the scale make it easy to read. Equipped with bidirectional drive mechanism, measures torque in clockwise direction. Simple and reliable operation.    Range covered: 2-230 NM (1.5-169.5 FT-LB). Pre-calibrated to ± 4%. Calibration certificate included. To DIN ISO 6789. Bi-directional drive. Quick release of socket. Easy read scale. Simple and reliable operation. Heat treated CR-MO drive, 45T gear. Non-slip knurled handle. Black electroplated surface. Lengths: 1/4" - 270mm, 3/8" - 370mm, 1/2" - 425mm.