DescriptionThis is a set of guitar gauge set which is made of metal with rounded off edge, rustproof and corrosion-resistant, won't scratch or hurt your hands, durable for long-term use. Quickly and accurately find the curvature of a fingerboard or bridge with these radius gauges without taking the strings off.Features-Color: Silver. -Material: Metal. -Size: About 9x9x0.1cm. - Made of metal materials, rustproof and corrosion-resistant, durable long time use. - With rounded off edge, won't scratch or hurt your hands. - Light weight and portable, easy to carry and storage. - Quickly and accurately find the curvature of a fingerboard or bridge with these radius gauges without taking the strings off. - Different ruler can meets your different needs.