Large square sew-on snaps sized 21mm (7/8") suited to coats, capes, heavy cardigans and décor projects needing a stronger, easy-to-sew closure. Each part has four sew-through slots for secure, even stitching and consistent alignment. Rust-resistant metal construction offers a smooth action and a clean look without visible buttons. Use on wide plackets, pocket flaps and cushion backs for a crisp, modern hardware finish.