COMPREHENSIVE GUITAR SETUP KIT all-in-one guitar setup kit includes essential tools like 16" (400mm) fret leveler sanding beam, guitar neck notched straight edge luthier tool, 9-piece understring radius gauge set, 4-piece notched guitar fretboard and string radius gauge, string action ruler gauge, fret rocker, and feeler gauge, making it perfect for luthiers and DIY enthusiasts alike. whether you're adjusting the action, leveling frets, or measuring neck straightness, this kit has everything you need to achieve the perfect setup for your guitar. VERSATILE RADIUS GAUGE SET guitar tool kit comes with 4-piece notched guitar fretboard and string radius gauges and 9-piece understring radius gauge set, allowing you to measure and match the radius of your guitars fretboard and strings effortlessly. This ensures optimal string curvature and consistent action, contributing to a comfortable playing experience. The set includes multiple gauges to fit various radii, making it a must-have for any luthier or serious guitarist. COMPLETE MEASUREMENT TOOLSThe string action ruler gauge, fret rocker, and feeler gauge included in this kit provide precise measurements for string height, fret level, and neck relief. These tools are essential for making accurate adjustments, ensuring your guitar plays beautifully with minimal fret buzz and optimal action. PRECISION 16" FRET LEVELER SANDING BEAM 16" (400mm) fret leveling sanding beam is designed for precise fret leveling, allowing you to achieve perfectly even frets, eliminate buzzing, and improve the overall playability of your guitar. Ideal for luthiers and guitarists who demand accuracy in their setups. Comes with 12pcs replacement sandpapers which could meet various polishing needs, allowing you to achieve the desired level of smoothness on your frets or unfretted fretboard. ACCURATE NECK ADJUSTMENTThe guitar neck notched straight edge luthier tool is specifically designed to help you check the straightness of the neck under string tension. Its precision-cut notches fit snugly against the frets, providing an accurate reading and making neck adjustments easier and more reliable. Perfect for maintaining proper neck curvature and ensuring a smooth playing experience. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.