Description from Amazon USA :
- Professional capo built to last - built of lightweight high quality zinc alloy (aircraft grade metal).
- Easy to move - fits perfectly electric and acoustic guitars, ukulele banjo, folk guitars and mandolin, and so on.
- No scratches - high quality silicone pad will protect your instrument against damage
- Change position smoothly between frets on stage with one hand. No fret buzz - stays in tune with a great intonation in all frets.
- High performance - steel spring with internal memory to provide strength and fatigue resistance. It will put just enough pressure on each guitar