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 No fret buzz - stays in tune with a great intonation in all frets. Quickly change position between frets on stage with one hand. High performance - steel spring with internal memory to provide strength and fatigue resistance. It will put just enough pressure on each guitar.