A theory I saw recently suggested that they may have been used to hold candles, as night lights (could still have had some religious or ritual component too). The holes all being different diameters would then relate to different sized candles being needed to last all night, for longer and shorter nights at different times of the year. The twelve faces presumably corresponding to 12 months on the Julian calendar, whi…
I don't know. There are stranger things of course, but why would you care about that? If you need light you just burn the candle until you no longer need the light. If it gets too short you get a new candle. If you no longer need light (for example because the sun has risen) you put it out.
Having a bunch of candles with different thicknesses, and a complicated and presumably expensive tool to measure them does not feel like the way to go forward.