Boston locking machine heads guitar, die cast 6L, low gearing 19:1, chrome
Boston locking machine heads guitar, die cast 6L, low gearing 19:1, gold
Boston locking machine heads guitar die cast 3L3R, low gearing 19:1, chrome
Boston locking machine heads guitar die cast 3L3R, low gearing 19:1, gold
Boston locking machine heads guitar die cast 3L3R, low gearing 19:1, black