19:1 ratio, smooth tuning. 9mm (3/8 inch) peg hole Traditional American style open frame designing. Good replacement for Acoustic guitar Vertical, 3x3 set, includes mounting accessories Full metal, open vintage style design, quality electroplate finish and hardware Dear customer, I am looking forward to your purchase. If you have any questions before or after the purchase, you can contact us, and we will provide you with quality service.