IKN 6pcs 3L3R Semiclosed Guitar Tuning Pegs Tuners Machine Heads Black Set of 6pcs(3L3R) Guitar Tuning Pegs for steel string(electric or acoustic)guitars. Semi Closed machine head withheavy duty internal gear. Button Size: approx. 22.2mm width.Shaft: approx. 6mm diameter, 26mm long. Bushing: approx. 8.2 mm outer diameter. Material:Metal.Color Black. Package Including:3 x Left machine heads,3 x Right machine heads,6 x Ferrules,6 x Threaded bushing,6 x Screws