Heavy‑duty, rust‑resistant snaps for firm, heavyweight materials. Each 15mm (5/8") set includes cap, socket, stud and post to create secure closures on bags, outerwear and utility gear. These no‑sew snaps install with a compatible hand tool or press and are designed for repeated opening and closing without loosening. Match the post length to your fabric thickness for the best hold and reinforce thin areas with interfacing if needed.