Jewelry saw blades - for cutting metal. Comes bundled with wire. (2 bundles of 12.) Insider tip. Don't take the wire all the way off - just unravel half way, and slip the blade out of the pack. Keeps the rest neat and tidy and together until you need them next. Size relates to the number of teeth per a given length - Cut/Bur Lube to extend your blade life.
By the pack of 12.