This set of 2 radius gauges come with 8 preision radii, You can use them to measure the radius of fingerboard, bridge, saddle and nut. 7.25”, 9.5”, 10”, and 12” radii, the other one has 14”, 15”, 16”, and 20”.

Made of laser cut stainless steel, 3-1/4” (82.5mm) wide.