Stable aluminum construction: This fret leveling block is made from an aluminum alloy, delivering exceptional durability and stability for all your guitar-building needs. Precise fret settings: Change the radius of a fretboard or adjust it while leveling frets, significantly improving the playability of your stringed instruments. Two-way sanding beams: Innovative design with two different radii on each rail, providing efficient solutions for a range of guitar and bass setups. Scratch-resistant design: Protective features prevent scratches or damage during the leveling process, helping preserve the instrument’s finish. Use scenarios: - Re-radius a fretboard while leveling frets on a guitar or bass. - Work on instruments with different fretboard radii, from flatter to more curved. - Perform maintenance tasks without risking surface damage to the neck or body.