Capo for Acoustic Guitar - Electroplating (Galvanized) High Density Alloy Material - Tungsten Steel - Memory Steel Spring Guarantees a Secure Fit and Easy to Clamp with One Hand - Works on Electric, Acoustic and Classical Guitars as well as Ukulele With unique high density alloy materials forging, hard to be out of sharp and excellent performance Heavy duty internal memory steel spring guarantees a secure fit every time High density silicone padding protects your instrument against wear and scratches Concise streamline design, comfortable and convenient Works on acoustic guitar, electric guitar, classical guitar and ukulele