Seprendi 1 Set Sealed String Tuning Nail Tuning Machines Heads Tuners Tuning Nail Keys 3 Left 3 Right Tuning Nail for Acoustic Guitar Silver

MATERIAL: hard acrylic, ABS plastic and steel. SOUND QUALITY: Keep the guitar tuning simple and accurate, mainly used for 6-string classic guitars (electric or acoustic). PACKING: 6 guitar string tuning nails, 6 ferrules, 6 mounting screws. FUNCTION: These guitar tuning nails are perfect replacements for old and bad tuning nails. These guitar tuning nails have high sound quality through many tests. Gear ratio: 1:14, with heavy duty internal gear, fit 10mm (0.39inch) standard machine heads hole.