- Stable aluminum construction: Made from an aluminum alloy, this sanding block offers durability and stability for long-term use. - Precise fret radius adjustment: Easily fine-tune the radius of the fingerboards and level frets with precision, improving overall playability. - Two radius options per sanding bar: Each sanding bar provides two radius options, offering flexibility for different instruments. - Protective during leveling: Features to shield your guitar or bass from scratches while leveling. Use scenarios: - For professional guitar and bass setup and fret leveling, delivering consistent results without damaging the instrument. - For radius customization on necks with varying fretboard radii on electric, bass, and other instruments. - For luthiers and technicians performing routine maintenance, providing reliable performance over time.