Radius wood blocks for spot-leveling frets and fingerboards, just add sandpaper. Short length is great for working on compound radii. They make great fret-gluing cauls, too!
Shaping fingerboards: use 80 through 220-grit
Leveling frets: use 220 through 400-grit
When working on compound radius fretboards, simply change blocks as you progress along the neck.
These 4" blocks are used for spot leveling, and can also be used as a radiused clamping caul when gluing frets.
Dimensions: 4" (101.60mm) long x 2-3/4" (69.85mm) wide