Using these spoke wrenches is easy. Just pick the right - sized wrench for the spoke you're working on, which you can quickly identify by the color on the vinyl coating. Fit the wrench onto the spoke nipple and turn it to adjust the tension. When using, don't apply too much force suddenly as it might damage the spoke or the wrench. As for maintenance, keep the wrenches clean. After each use, wipe them down with a dry cloth. If they get dirty, you can use a mild soap and water solution to clean them, then dry thoroughly to prevent rusting. Store them in a dry place in your toolbox or bike bag so they're always ready when you need them.