Tetra-Teknica GC106 Single-handed Guitar Capo Quick Change, Color Black Made of high-grade Aluminum Alloy, works great for acoustic, electric and classical guitar, ukulele, bass, banjo & mandolin Easily re-position with one hand, keep all strings perfectly pressed and always in tune High quality silicone pad protects your guitar neck against any scratches or damage Ultra lightweight and durable Works great for narrow-neck guitar measures around 1.8" or less; not recommended for wide-neck classical nylon-string guitar