Using the D'Addario Pro - Winder is a breeze. First, if you need to remove the old strings, use the built - in clipper to cut them. Then, use the bridge pin puller to take out the bridge pins for acoustic instruments. Once the old strings are out, start winding the new strings with the string winder. It's very easy to hold and use because of its ergonomic design. When using the cutter, be careful not to cut your fingers. After each use, wipe the tool with a clean cloth to keep it in good condition. Store it in a dry place to prevent the steel parts from rusting. This tool is suitable for most guitars, banjos, ukuleles, and mandolins, so you can use it for different instruments.