Using this Topeak torque wrench is easy. First, decide on the torque you need between 4 and 20Nm. Just pull and rotate to set your target value. Then, pick the right tool bit from the 9 available ones. When changing or removing a bit, the knurled design gives you a good grip. To work on a bolt, use the ratchet wheel to tighten or loosen it. Listen for the 'click' sound, which means you've reached the preset torque. When you're done, put the tool bits back in the organizer. Keep the tool clean after each use. Avoid dropping it as it can damage the precision parts. Store it in a dry place to prevent rusting. And if you're not using it for a long time, set the torque to the lowest value to keep the internal mechanism in good shape.