A capo is a small device that clamps onto the neck of a guitar, changing the pitch of the open strings. There are a few different types of capos, but they all function the same way—by clamping onto the guitar's neck and holding down the strings against the fret.This particularly is perfectly balanced pressure for that clear tone with Widening thicken high-resilience steel springs,High-density aluminum alloy material and much thicker silicone