The Shelf Bracket is constructed of Type premium grade metal which ensures the durability and hard-wearing, allowing it to remain to look its best for longer. They are designed to work great for shelving systems for the home, shop, garage, or business. Simply assemble multiple brackets using screws, bolts, or nails and a section of shelving. There is no wood board included. And it is recommended that the width size of the wood board should not exceed 4 inches of the stainless steel bracket. Product Features -Made from high-quality stainless steel Best for longer uses Easy Installation Quality Assurance Resist daily scratches