Replacement violin and viola bow screw and rod for frog assemblies. Designed as a direct replacement part to restore secure frog mounting and reliable hair tension adjustment on bowed string instruments. Key benefits Restores function: replaces worn, stripped, or broken bow screw and rod so the frog can hold and adjust hair tension properly. Smooth, precise adjustment: precision machining ensures consistent threading for reliable tightening and loosening of the frog. Easy to install: fits standard frog assemblies for most violin and viola bows and can be installed by a luthier or experienced player using basic tools. Durable fit: engineered to sit securely in the frog and maintain alignment under normal playing and tuning conditions. Important attributes Function: replacement screw and rod for bow frog assembly, used to adjust hair tension and secure the frog on the stick. Compatibility: suitable for violin and viola bows that accept standard frog screw and rod fittings. Size and fit: manufactured to standard dimensions for common bow frogs to provide a close fit with minimal modification required. Construction and finish: precisionmade metal component for reliable mechanical performance and consistent threading. Practical use scenarios workshop: a luthier replaces a stripped screw on a student violin bow to restore proper tension control and eliminate slippage during lessons. Touring musician: a working player keeps a spare replacement rod on hand to quickly fix a loose or broken frog while traveling between rehearsals. Instrument restoration: a hobbyist restoring an older bow installs the replacement screw and rod to corroded or damaged parts and the bow to functional condition. What to expect A straightforward, purposebuilt replacement part that restores essential bow function. If alignment or sizing adjustments are needed, a professional service or experienced technician can make small fittings to achieve an fit.