Durable, reliable and accurate mechanism.Fast scale adjustment reducing the effort required to adjust .TIMESTRIP visual indication that the wrench is due for re-calibration and has 3, 6, 9 and 12-month graduations .Large dual scale in N·m/in.lb .Range covering from 3 to 25 N·m/27 - 220 in.lb torque values .Can only be used clockwise .Accurate to ±3% of reading which exceeds the requirements of ISO6789-1:2017 .Clicking system triggers a tactile and audible signal .Reversible ratchet head with 1/4" square drives allowing CW operation only .Handle centre or calibration force point marked on handle .Lock/unlock knob with blue ring inside to warn the operator the wrench is unlocked .In a semi-transparent square tube with eurohole hanger .All wrenches come with a factory calibration certificate according to ISO 6789-2:2017 .Made in the UK