Utilizing innovative FlexFit technology to mimic the biological anatomy of the human finger, the silver Pro Plus Capo from D'Addario is a great way to achieve solid tuning changes without any buzzing, muted strings, or intonation issues that would normally be caused by unbalanced capo pressures. Ideal for 12-string guitars or any instrument with octave pairs of strings, the Pro Plus excels in both live and studio environments with its easy screw-style attachment and its ability to automatically adapt to any fretboard radii, from the flat fingerboards of classical guitars, to the small 7" radius of vintage electrics.