The basics These fabric eyes provide a clasp for nearly any type of hook to grab on to. The benefits These eyes are designed to be secure enough to not need replacement parts, but should the need arise, you're bound to find the piece you need in this set. The uses A hook-and-eye closure is a very simple and secure method of fastening garments together. #6 also known as King Henry. The bottom line Eyes come in standard black and silver, so you don't need to worry about color matching before buying.