GOTOH® SD91 05M MG 6 Inline Locking Guitar Tuners. These vintage style beauties offer classic functionality. Featuring front string locking (Magnum Lock) with metal oval buttons they include all mounting screws and bushings. Kluson style design, they're perfect for vintage and reissue guitars. Rock on with ease and precision! Good to know these are replacement tuners for Fender® part number #099-2040-000 on Stratocaster® and Jazzmaster® guitars and can also be used on left handed reverse headstocks.