Fits accoustic/classic/electric guitar, bass and other stringed instruments 6 inch radius, designed for working with radiused fretboard, eliminating the possibility that fret end can't be seated right or the hammering causes the frets deformation Length: 63.5mm(2-1/2 inch), width: 13.5mm(17/32 inch), thickness: 3mm(1/8 inch) Solid brass material with precise digital CNC processing technic, durable and anti-corrosion