Today’s advanced torque testers include the ability to measure in clockwise and counter-clockwise directions, convert to 8 engineering units (in·oz, in·lb, ft·lb, N·m, cN·m, kgf·cm, gf·cm, kgf·fm), 3 modes of operation (peak, 1st peak, track), and include a National Institute of Standards and Technology certificate (or its domestic ... It’s suitable for use in a clockwise and counterclockwise motion and works perfectly in small spaces where other wrenches would fail. Like most other tools from the Bulltool brand, this wrench is made according to international DIN-ISO 6789 standards, which is a mark of both quality and performance. A torque wrench measures torque, which is how much force is applied perpendicular to a lever at a known distance from the pivot point of the lever. In the case of tightening things, the bolt/nut you are working on is the pivot point. Measurements are in usually in Ft-Lbs or NM (sometimes Kg-M), or in-Lbs for smaller forces.