This unique knob combines a high accuracy (+/- 4%) clutching type torque tool within an attractive ergonomic grip. The tool has an integral lockup design that overrides the torquing action in the un-tightening direction. Color coded laser marker ID ring on face of the grip facilitates use of multiple units. Tool supplied with 3/8" mating hole secured by 1/8" roll pin. Adapter kit converts tool to 1/4" mating hole, 3/8-16 by 1.5" bolt end or 1/4-20 by 1" bolt end.