General description The 100 Pieces Set Adjusting Pin Nails and Rivets is designed for stringed musical instruments such as harps, dulcimers, and zithers. This set includes durable metal strings, high-quality tuning pins, and a convenient L-shaped wrench for easy adjustments. The components are crafted to ensure a clear and beautiful sound while providing a comfortable tuning experience. Technical specifications Material: Metal Color: Wood color + silver + gold Package Contents: 5 x Tuning Wrench, 100 x String Pin Nails, 100 x Rivets Measurement allowed error: +/- 1-3 cm Usage Use the L-shaped wrench to adjust string tension by turning clockwise or counterclockwise. Replace loose tuning pins to maintain optimal performance of your instrument. Ideal for use with dulcimers, zithers, harpsichords, and harps. Other information Note: Light reflection and different displays may cause the color of the item to differ slightly from the actual product.