Description:This fretboard arc grinding block is a fret fretboard leveling and guitar fret repair tool that accurately displays or changes the fretboard radiusThe Fingerboard is in size of: Length is about 130mm/ 5.12 inch; Width is about 68mm / 2.68 inch; Thickness is about 42mm / 1.65 inch. In the pack of 1 × Radius Sanding BlockIt is made of wood. The grooved side design and smooth surface make it more comfortable to holdWhen working on a compound radius fretboard, you just need to move along the neck to change the blocksPlease note the sandpaper is not included.