- Stable aluminum construction: This sanding block is made from an aluminum alloy, providing durability and stable performance for all your luthier needs. - Precise fret settings: Easily adjust the fretboard radius or modify while leveling frets, significantly improving the playability of your stringed instruments. - Two-way sanding rails: Innovative design with two different radii on each rail, delivering efficient solutions for various guitar and bass setups. - Scratch-resistant design: Features protective elements to prevent scratches or damage during the leveling process and to preserve the instrument finish. - Use scenario: Ideal for fret leveling on guitars and basses, enabling radius adjustments to match neck profiles while maintaining playability. - Use scenario: Useful during setup and maintenance of instruments with varying neck radii, ensuring accurate fret height without compromising finish. - Use scenario: Suitable for routine refinishing and minor adjustments in a workshop, providing protection for the instrument surface during sanding.