Aluminium alloy construction provides lasting stability and deformation resistance, making this fret leveling block a reliable tool for guitar builders and technicians. Precise fret leveling and fretboard radius adjustments enable accurate leveling and radius matching, improving playability and overall performance for guitars and basses. Innovative dual-radius design features sanding bars with two radii for versatility and efficiency across different fretboards and instruments. Built-in scratch protection prevents scratches or damage during the leveling process, keeping your instrument and gear pristine. Use scenarios: - During fret leveling and radius setup on a guitar renovation or rebuild to ensure even frets and correct radius. - In a professional shop for routine setups on guitars or basses with different fretboard radii. - For DIY luthier work where protecting the instrument while leveling is important.