Pisanki Ażurowe [openwork eggs] is a Polish / Ukranian art using the of shell of chicken, duck, goose and ostrich eggs. The technique involves drilling holes in the shell using a tiny dental turbine drill.
While diseased teeth were once simply extracted, advanced dental drills made it possible to fix the damage instead. The wooden drill is the earliest dental tool for working on teeth. The silver device is an early example of a clockwork drill; it was the first drill that could rotate continuously to remove damage from a tooth, though after being wound it only ran for about two minutes. Ouch.