Using the Birzman Ranger Multi - Tool with M - Torque is easy. First, select the appropriate bit for the bolt you need to tighten. Hold the tool and start turning the bolt. As you do, keep an eye on the raised button. When you feel the button click, you've reached the correct 5Nm torque. When using the multi - purpose tire lever set, be gentle to avoid damaging the tire. After each use, wipe the tool clean with a dry cloth to remove any dirt or debris. Store it in a dry place to prevent rusting. And always double - check the tightness of bolts before riding.