Precise fret fitting - Addresses common fret problems such as uneven crowns and burrs to deliver an optimal fit for acoustic models through bass-curve alignment, improving playability. Popular solution - Favored by musicians to achieve smooth fretwire surfaces, enhancing playing feel and tonal quality. A valuable tool for all string instrument enthusiasts. Smooth performance - Multi-face grinding provides a smooth playing surface by effectively removing burrs and oxidation. Restores stable intonation and a metallic shine with ease. Reliability - Gentle contact points and a rigid structure support stable grinding with millimeter-precise accuracy, refined edge handling, and careful workmanship. Use scenarios - Luthier setups for acoustic and electric guitars during fret crowning and leveling to ensure precise fit and consistent action. - Post-maintenance fret polishing on established instruments to restore smooth feel, accurate intonation, and brighter tone. - New fret installation on build or refinish projects, where bass-curve alignment and careful edging improve overall playability and setup quality.