Leveling Fingerboard Luthier Tool Radius Sanding Blocks for Guitar Bass Fret Musical Instrument Accessory

Features:
Hard wood guitar fingerboard sanding block.
Accurately or change a fingerboard's radius, it also suitable for gluing frets.
When working on compound radius fretboard, simply change blocks as you progress along the neck.
A quick visual check keeps you from accidentally altering the shape a mistake that's easy to make and hard to fix.
Groove sides for comfortable grip.