These are standard Gotoh Kluson-type tuning pegs. They were replaced with Magnum Lock tuners when I purchased a Fujigen Telecaster-type guitar and have been stored since then. I believe they can be used on reverse headstocks and left-handed 6-in-line headstocks. Unused mounting screws and a steel rod for removing the bushings are included, but the bushings themselves are not. Please prepare the bushings separately.