Wood Guitar Radius Block Grinding Bass Guitar Fret Leveling Fingerboard Tool for Luthiers Guitar Accessories1. Bi-directional fingerboard sanding block for sanding frets and leveling fingerboards. There are two different rays on each block.2. Innovation design, each sanding block can tarnish 2 radius.3. Material: Maple. High gloss, durable and long-term use, not easy to deform. The groove side design provides a comfortable grip.4. Note: sandpaper included (grit 600). Different guitars need different bow grinding blocks, please confirm the size of your guitar or bass before you buy. Dimensions: 150mm x 75mm x 35mm (5.9 x 2.95 x 1.38 in) Matte Paper (600 grit): 146mm x 65mm (5.75 x 2.56 in) Sanding Block Weight: 328g/11.57 oz2 bite board radius used in electric guitars amp; Bass Construction and Repair: 7). 25 inch-9.5 inch, 10 inch-12 inch, 14 inch-15 inch. Material: WoodColor: Wood ColorPackage Contents:1 x Sanding Block2 x Sandpaper (600 Grit)Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.