Specifications: Accurately true or change a fingerboardand 39 s radius. Used for shaping a radiused fretboard and leveling installed frets Various radius are available: 7.25andquot , 9.5andquot , 10andquot , 12andquot , 14andquot , 15andquot , 16andquot , 17andquot , 20andquot . When working on compound radius fretboard, simply change blocks as you progress along the neck. Item Name: Radius Sanding Block Material: Wood Length: 13cm or 5.12andquot (Approx.) Height: 6.8cm or 2.68andquot (Approx.) Notes: Due to the light and screen setting difference, the itemand 39 s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Radius Sanding Block.You'an store products Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.