KENPMA Quick Change Clamp Key Guitar Capo for Acoustic and Electric Guitars, Ukulele, Banjo, Mandolin, Bass, Zinc Alloy Material Guitar Accessories - Sliver Zinc alloy material, durable. A perfect fit for the necks and fingerboards of acoustic 6-string guitars. Fits comfortably in your hand. Without adjustment. Can be quickly and easily released and repositioned. A snap to park on the headstock and then reposition between frets using just one hand. Can clamp on most fretboard. Small in size, convenient and portable. Hold the strings nice and tight. Can even change keys during a song. Designed For Acoustic Guitar, Classical Guitar, Electric Guitar, Ukulele, Banjo, Bass & Mandolin