Head down to your local Hardware store. I know McClendons has them. They have a kit with everything you need. You supply the hammer. Nothing to it just make sure everthing is square. Give it a good wack and your snap is secured on the canvas. On my new boat I lube them with a wax I got from boatersworld. It comes in a chapstick container. It will keep them from rusting and make it easier to take them off.