The center part may be the clasp (or hold some "Orange Man Bad" voodoo concoction but going around they do look like bullets. 
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Right click on the pic and open it in a new tab or window.
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Apple FReepers are on your own. ;-)
Again, doesn’t look like a bullet casing at all to me. Probably full of cyanide for her in-case Trump wins in 2020
You can watch the video and Nancy says it at 3 minutes and 31 seconds.
Safe image search: Bullet Bracelets
Click on a bracelet and you get a close up - source page for the bracelet pic is on the right. Be careful!
It’s also ugly, yet there she is, showing it off. Probably costs thousands of dollars, too.
Looks like a .45 ACP round. Or a .44.
That looks like a tiny skull of a human with an eye blown out. That bullet with some modified false teeth she could build a gun anyplace.