Handsome die-struck component. You could sure have a lot of fun with these. Some are a little bent - but they flatten out easily. Loop for hanging at the narrow end.
Not sure what the metal is.
Metal components from a vintage warehouse sale - these were probably produced as custom items for a well-known fashion jewelry house, and these would be end of line when production changed. Lot of creative possibilities here!
17mm x 56mm By the each.