69 Sets Snap Fastener Kit Button Tool Press Studs Fastener Snap on Set Clothing Snaps Kit Fixing Tool (633(12.5mm)) by Outee

These are crimp on snaps. Cut a small hole for the rivet to fit through, push and snap in place. You can do the same thing with a block of wood a rubber mallet. Try looking at the photo on the 4th image has a good diagram. snaps