Stable aluminum construction This grinding block is made from an aluminum alloy, providing exceptional durability and stability for all your luthier needs. The solid construction helps keep the tool steady during fret work and radius adjustments, reducing slipping and improving repeatable results. Precise fret settings Easily change the fretboard radius or adjust it while leveling frets, enabling you to fine-tune playability across the neck. This feature supports accurate radius matching during refrets or setup, contributing to a consistent feel along the fretboard. Dual-radius sanding beams Innovative design with two different radii on each beam, enabling efficient handling of a variety of guitar and bass neck profiles. The two radii give you flexibility to match your neck’s radius or to experiment with different feels during setup or refrets. Scratch-resistant design Built with protective features to prevent scratches or damage during leveling, helping preserve the instrument’s finish. This design minimizes risk when working near delicate fretboard surfaces and edges. Use scenarios - Refretting a guitar or bass: Use the dual radii to align with the neck radius while leveling and crowning frets, achieving consistent action and playability. - Radius customization during neck modification: Switch radii to match a preferred neck profile or to compensate for changes in play style, helping you tailor feel and intonation. - Routine setup and maintenance: While leveling frets, rely on the stable aluminum body to avoid slippage, and leverage the scratch-resistant design to protect the finish during processing.