:21 gear ratio with sealed lubrication, cast housings and metal knobs. Gear Ratio - 1:21, designed to fit modern 10mm headstock peg holes. Comfortable and easy for adjustment of string tension. Trapezium shaped button with sealed housing and 90 degree fixing tag. Guitar locking tuning machines with heavy duty internal gear, sturdy and convenient. Easy to install, easy to replace your old or dirty guitar tuning pegs. Colour:Bronze Material:Zinc alloy Package Contents: 6 * guitar pegs 6 * nuts 6 * spacers 6 * screws 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.