quality mandolin tuning pegs designed to improve tuning precision and overall playability. Key features and benefits Configuration: 4L+4R layout for left and rightside string arrangement, compatible with standard 8string mandolins. Gear ratio: 1:14 gear ratio for fine, precise string adjustments and stable tuning. Standard sizing: 25 mm centertocenter spacing between pegs and designed for 0.8 mm peg holes to fit common mandolin pegboards. Workmanship: Precisioncrafted components and smooth gear action for reliable operation and consistent performance. Complete installation: Includes fittings to simplify installation; designed for straightforward mounting without the need for additional special parts. Why you need it Makes tuning more accurate and stable through a ratio gear mechanism. Replaces worn or loose tuners to restore secure tuning and smoother turning. Fits standard mandolin dimensions so you can upgrade or without extensive modification. Practical use scenarios old or damaged tuners on an acoustic mandolin to regain reliable tuning and smoother string changes. Upgrade factory tuners when building a custom mandolin to achieve finer adjustment and better tuning stability. a student instrument at a music school or workshop where standard 25 mm spacing and 0.8 mm peg hole sizes are used. Additional notes Confirm your instrument has 25 mm spacing and 0.8 mm peg holes before to ensure compatibility. Installation hardware is included for convenient fitting.