Hosco 3-in-1 Fingerboard Radius Gauge. This useful tool is a great addition to the luthier's tool kit. Gauging fret crown height (0.1mm – 1.5mm). Gauging string action.
The "Hosco Guitar Fretboard Radius Gauge + String Action Luthier Tool" would be an ideal fit for professional musicians, guitar luthiers, and guitar enthusiasts looking to improve their instrument's playability and craftsmanship.