Zinc Metal Rings 3" 6/Pkg. These zinc metal rings can be used for a wide variety of craft and fashion projects. They feature sturdy construction with a bright finish. These versatile metal rings are available in a range of sizes (each sold separately). The rings are solid and have a closed design. You can run string from them to hang items for a wind chime, knit them into a fabric piece or do all sorts of other things with them.