In order to use the expansion set you must specifically own Matthew Garrett’s 4 Linking Rings set in Silver, which contains rings that measure precisely 4.5″ external diameter.
Please measure to make sure you have the right set prior to ordering.
The rings are precision made and other sets will most probably not work with this expansion set.
GiR are very high quality close-up linking rings that use a revolutionary new method, allowing rings to be joined and (with no switch) passed out for examination.