With this tool you can quickly wind up the strings of your guitar. If you have to change a rope quickly, this tool is essential. It also has a slot that allows you to remove the pins from the acoustic guitar, producing a small lever effect. If you play shows, always have a tool like this in your survival kit.
It's recommended to clean your instrument after every playing session, the rosin used in the bows can be a bit abrasive and needs to be removed. This liquid is a mild cleanser that helps dissolve the rosin builds up in your bow instrument.