Features: Professional Fret Leveling Beam with 4 pre glued sandpapers (400# 1200# grits) ensures precise fret, saddle, and fingerboard polishing for guitars/basses. Crafted from premium rust proof aluminum alloy, this multi length tool (150mm 400mm) features a reinforced straightening beam for consistent neck leveling and performances. Essential for luthiers, musicians, and enthusiasts maintaining electric/acoustic guitars, bass guitars, or classical instruments through fret dressing and fingerboard restoration. Achieve professional results for home workshops or music studios by smoothing uneven frets, correcting issues, and restoring optimal string action height. Versatile 4 in 1 grit systems transitionings seamlessly from coarse leveling to polishing, ensuring flawlesses playability across all string instrument types. Specifications: Component: Metal Overall size: 150mm: Approx. 5.9x1.5x1inch(150x38x25 mm) 200mm: Approx. 7.9x1.5x1inch(200x38x25mm) 250 mm: Approx. 10x1.5x1inch(250x38x25mm) 400mm: Approx. 16x1.5x1inch(400x38x25mm) Package Includes: 1x Wire leveling beam note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.