A range of metal thread adapters, to interface between almost every thread type used on microphone stands and clamps, whether commonly in use or from more “legacy” designs.
53-217 is the most common type required. This interfaces between the American 5/8″ mic clamp thread and the European 3/8″ mic stand thread.
53-215 and 53-220 interface between the standard 1/4″ photographic thread and the European 3/8″ mic stand thread.