Call on these nostalgic number rings to organise and prioritize all the important things you dont want to forget Pop them onto books magazines brochures or anything really and return to them quickly and completely unflustered when you need the information again. There are 10 classic clip-on digits from 0 to 9. Those of you old enough to remember the days of real dial telephones will surely rejoice that a new use has been found for this much loved design icon.Features. 10 numbered rings.. Clip on discs.. Retro dstyling.