Alright, these sew-on snap buttons are super handy if you're into sewing or DIY projects. Each set comes with two parts - the front and back - that snap together really securely. They're 19mm (about 0.75 inches) in diameter, which is a good versatile size that works for lots of different projects. Made from copper with spring mechanisms, so they're sturdy and won't rust or fade easily. They've got 6 hand-sewn holes around the edges, which makes them really secure when you stitch them onto fabric. Unlike zippers that can get stuck, these snap buttons open and close smoothly every time, and they hold up well through multiple washes. You get 100 sets total - 50 in gun black and 50 in silver - so you've got plenty to work with. They're perfect for jeans, jackets, hats, backpacks, wool coats... basically anything that needs closures. What's cool is they're invisible when sewn on, so they don't mess with your design aesthetic. Great for replacing broken snaps or adding custom closures to your DIY creations. Just be careful with little kids around since they're small parts, but otherwise they're super useful to have in your sewing kit. Seriously, once you start using these, you'll find all kinds of projects to use them on!