Mustang Guitar Pics And Guitar Capo Hardened Fibre (Red) Quick-Change Capos A Quick-Change is expertly engineered and built to last. It is reliable and does just what it is designed to do - clearly raise the pitch of the guitar so you can play in a different key without returning or changing fingering. Seasoned professionals and beginning players alike appreciate how the Quick-Change helps them transpose their guitar in seconds, with only one hand. The beauty of the Quick-Change is in its simplicity.