This is a synchronized tremolo bridge that was installed on a Tokai ST60. It features a separate steel block. The "FINAL PROSPEC" stamped saddles were used on Tokai Stratocaster-type guitars manufactured in the 1980s. These are rare parts that are difficult to obtain individually now. Offered for sale to organize equipment. Block Length: 41.5mm Included: Springs, hanger, mounting screws, arm (the arm is from Fender Japan)