ITEM NAME:1pc Radius Sanding Block for Guitar Bass Fret Leveling Luthier Tool 9.5-7.25 Description: Wooden Fingerboard Leveling Sanding Block for Electric/Acoustic Guitar Bass. Used for shaping a radiused fretboard and leveling installed frets Various radis: 7.25"/9.5" Material: Maple Package Includes: 1pc Radius Sanding Block SKU: CKX0010063778007469.Wooden Fingerboard Leveling Sanding Block for Electric/Acoustic Guitar Bass. 1pc Radius Sanding Block. Used for shaping a radiused fretboard and leveling installed frets. Material: Maple.