Our new magnetic snap is a wonderful sew-in snap, and by sew-in, we of course mean MACHINE-SEW-IN, because we don't like hand-sewing any more than our customers do. Our magnetic snap is encased in sturdy yet pliable plastic which is a "snap" to sew over, making it completely invisible on the outside of the bag. And don't worry, these snaps are designed to operate perfectly through several layers of fabric. 1 set of magnets in each package.