This radius gauge of stainless steel helps to get a correct radius of fretboard quickly and easily.Features:Made of stainless steel.Etched metric markings into surface for easy of reading.Get a correct radius of fretboard quickly and easily.Specifications:Material: stainless steelPackage size: 21 * 3 * 0.1cm / 8.3 * 1.2 * 0.04inPackage weight: 17g / 0.6ozPackage List:1 * Radius Gauge