IKN Silver Color 5/6 String Electric Bass Tuning Pegs Sealed Kind 3L3R Machine Heads Keys Set of 6pcs(3L3R) Bass Tuning Pegs for Electric Bass Guitar Parts Replacement. Full Sealed Machine Heads,Heavy duty internal gear. Button Size: approx. 33mm width.Headstock Shaft :approx.14mm diameter. Material:Metal.Color:Chrome. Package Including:3 x Left machine heads,3 x Right machine heads,6 x Ferrules,6 x Threaded bushing,6 x Screws