Silvertone pinbacks for your brooch creations. These are 1.5-inch size.
This listing is for five (5) pinbacks. Buy some beads because, on larger orders, you really save on the shipping! Craft idea: last photo shows crocheted beaded brooch. Beads and beading wire available in other listings.
I'm not certain what they're made from. They're not precious metal or plated (which wouldn't last long), but I'm guessing steel. Like I said. Heavy duty!