Embodiments of a capo and fretting component are described. In certain embodiments, the fretting component is threaded onto a crossbar configured to overlie the instrument strings when in use and to pivot with respect to the crossbar so as to contact and press the strings against a fret on the instrument neck. The fretting component is offset with respect to the attachment mechanism of the capo, allowing the attachment mechanism to be offset on the neck of the instrument from where it would normally be positioned to achieve a comparable fretting effect.