Recorded: May, 2014
Found: Field Museum, Chicago, Illinois
Circa: <1050 BCE
This small object was pretty powerful. A person would use only one at a time, and it took quite a bit of skill to use it properly. We have somewhat similar things today, but they’re unusual.
Not used to help make anything.
It’s a thumb ring to allow an archer to hold their bowstrings as they drew their bows. It allowed them to hold the bow longer to wait for just the right moment to launch their arrow. This particular one is from the Zhou period dating between 1050 and 221 BCE. Here’s a picture of how it was used.