1、TWO WAY GRINDING: The guitar radius grinding block is designed with a two way fingerboard grinding function, each block provide two different radii. Perfect for accurate sharpening and smoothing of strings, making it an essential tool for guitar fingerboard sharpening tasks 2、SOLID MATERIAL: Guitar neck polishing block is made of solid maple wood, possess high gloss, long lasting, with long service life. The rugged material ensure that will not easily deform, providing reliable performance for all your needs of a guitar radius sanding block 3、COMFORTABLE SIZE: This guitar block measure 200mm x 75mm x 30mm(7.9 x 2.9 x 1.2 inches) and is designed to be comfortable and easy to hold. The fluted side design add extra comfort and is a handy luthier sanding block for fine work 4、INNOVATIVE DESIGN: Each guitar sanding block can calculate 2 radii. 2 fretboard radii for guitar and bass building and repair, useful and practical 5、PROFESSIONAL SANDING: Each set include a sheet of 600 grit sandpaper(196mm x 70mm / 7.7 x 2.75 inches), ensuring you have everything you need to get a smooth finish. This guitar fingerboard sanding block is perfect for a variety of guitar sanding tasks, helping you get professional results every time