Kluson Guitar Tuning Machines - 3 on a Plate - Nickel - Kluson WD90NPM Kluson replacement for Gibson Melody Maker, Les Paul, jr., SG, jr. Nickel, metal buttons. Real, authentic Klusons. Not Copies! Stamped onto the metal case in a single line down the center Overall length (Plate): 4-1/4"; Post Spacing (Center to Center): 1-3/8" Post Length: 1"; Post diameter: 6mm (1/4"); Bushing Diameter: 9.1mm Part Number: WD90NPM