• Flip reverse Chrome Vanadium steel ratchet head with smooth action mechanism • Scales graduated in N.m, Kg.m. or lb.ft • Calibration tolerance in accordance with BS EN ISO6789-1:2017 • Wrenches are individually tested to standards with ±4% accuracy and each wrench is issued with an individually numbered test certificate • Aluminium knurled handle for comfort and control • Set includes: 1/2", 1/4", 3/8"