6R guitar tuning nails are available for Vintage Strat / Tele style guitar replacement. The nickel-silver head has a durable internal gear. 6 right tuner with 6 ferrules and 7 screws. Suitable for older 8mm smaller tuner holes, but not for 10mm tuner holes; Right-handed guitar 6-in-line tuning shaft. Tuner shaft: approximately 6 mm in diameter. Ferrule: A diameter of approximately 8 mm and a tuning hole of approximately 8 mm on the spindle head. Material: metal Color: silver Transmission ratio: 1:14 Package Contents: 6 PCS Right Tuner 6 PCS ferrule 7 PCS screw Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.