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