Capo

Clamp that bars all strings at one fret to transpose a song.

The capo is a clamp that attaches to the guitar neck and locks every string at a given fret. It has two main uses: transposing a song into another key without changing chord shapes, and avoiding barre chords by playing open shapes at a different pitch. A capo on fret 2 turns a G shape into A. Essential for adapting a song to your voice or playing in duo.