Product overview A precision mounting head designed to adapt to guitar wire and match fingerboard curvature radius. This tool provides a controlled, adjustable arc that lets luthiers and technicians measure, set, and reproduce fingerboard radii accurately for setup, refretting, and maintenance. Key benefits Accurate radius matching: Adjustable arc conforms to common fingerboard radii to help create consistent string action and playability across the neck. Adaptive mounting head: Designed to accept and stabilize guitar wire or guide elements during shaping and sanding, reducing slippage and uneven results. Saves time and reduces rework: Use the tool to set the correct curvature before filing or sanding, lowering the chance of overcutting and minimizing trial and error. Simple to use in workshop or field: Quick adjustments let you switch radii without complex setups, making routine maintenance faster and more reliable. Improves final setup quality: Consistent radius control helps maintain proper string height, intonation, and neck feel after fretwork or refrets. Function and compatibility Function: Provides an adjustable arc that matches fingerboard curvature radius and secures guitar wire or guide components for accurate shaping and measurement. Compatibility: Suited for use with most electric and acoustic guitars and other fretted instruments where fingerboard radius must be set or matched. Size and fit: Compact design intended for easy mounting and use on standard neck widths and fretboard profiles. Adjustable settings cover a range of commonly used radii. Material and performance: Built for reliable alignment and repeatable results during routing, sanding, and filing operations in a luthier environment. Practical applications Refretting and fret leveling: Use the tool to set the correct fingerboard radius before crowning and leveling frets for a consistent fretboard profile. Nut and saddle setup: Match the fretboard radius when shaping the nut or dressing the saddle to ensure uniform string contact and improved playability. Radius sanding and reshaping: Secure a guide wire and follow the adjustable arc to restore or alter fingerboard curvature during restoration projects. What makes it stand out Combines an adaptive mounting head with a variable arc to offer a practical, repeatable way to match and hold fingerboard radius during multiple setup and tasks. Focused on precision and usability so technicians can produce predictable results without complicated calibration. Included functions Adjustable arc for matching radii Mounting head that stabilizes guitar wire or guides Quick, repeatable setup for common workshop operations This tool is intended for professional and hobby instrument technicians who need consistent, controllable fingerboard radius setup and maintenance.