Using the F15 multi - tool is a breeze. For general maintenance during your ride, just open the magnetic case. You can easily pick out the tool you need from the 15 available ones, like using the chain breaker to fix a broken chain. After your ride, use the built - in bottle opener to crack open a cold drink. When it comes to maintenance, keep the tool clean by wiping it with a dry cloth after each use. Store it in a dry place to prevent rust. Also, be careful when using the chain breaker to avoid any accidental cuts. If you're not sure how to use a particular tool, take a moment to study it before use.