Being able to measure your fretboard and string radius is a critical step in the setup process. MusicNomad’s precision Radius Gauge is packed with features and benefits. The accurate measurements (7.25”, 9.5”, 10”, 12”, 14”, 15”, 16”, 20”) and easy-to-follow instructions on the gauge give you the confidence to get the job done right. The premium stainless steel with polished smooth edges combined with laser-etched numbers and text ensures years of use.