IKN 6pcs Guitar Tuners Keys 3L +3R Set Sealed Electric/Acoustic Guitar Tuning Mechine Heads, Golden Set of 6pcs(3L3R) Guitar Tuning Pegs for Acoustic Electric Guitar Parts Replacement. Full Sealed Machine Heads.Heavy duty internal gear. Button Size: big half moon round style button, about 22.5 mm width.Headstock Shaft:diameter about 9.8mm. Material: Metal,Exquisite appearance with perfect workmanship and high-tech finish.Color: Golden. Package Including:3 x Left machine heads,3 x Right machine heads,6x Ferrules,6 x Threaded bushing,6 x Screws