Kluson Electric Guitar Tuning Machines - 6 inline - Nickel - Kluson SD9105MN Real, authentic Klusons. Not Copies! Stamped onto the metal case in a single line down the center Screw Holes (Center to Center): 15/16"; Bushing Diameter: 9mm Post Length: 1"; Post Diameter: 6mm; Split Post Includes bushings and mounting screws. Part Number: SD9105MN