Another versatile product, steel rings can be made out of virtually any of our existing material, not only smooth, regardless of size and thickness. These rings can be manufactured to any number of your specifications. Our most common rings sold are the four-inch outer-diameter ring in half-inch square material. Rings work great in wine racks, in-door and out-door railings, and gates. Most fabricators also use the rings to meet the four-inch bylaw code.