Jim Dunlop J88 Flat Classical Guitar Trigger CapoThe Dunlop Trigger Capo allows you to quickly and easily change key with a squeeze of the hand. This capos strong spring action clamp keeps it firmly in place, while its slim profile ensures that can play up and down the fingerboard unhindered. Special padding protects your instrument's neck from scratches. Made from lightweight aircraft grade aluminum, the Trigger Capo is a must on the road when you need to change key on the fly.