Heavy-Duty Design. The 20 inches shelf bracket is made of high-quality stainless steel, brushed surface and smooth edge. With a solid triangle structure, it holds up to 250 kg/550lbs, sturdy, hard-wearing, rust-proof, and durable, ideal for indoor or outdoor use.,Welding Gusset. The gusset inserts into 2 sides of the bracket, and the extra spot welds can keep the cross member from falling out. What actually is supporting the bracket is the gusset in the slot. 2 welding points on each side, enough to support more weight.,Easy Installation. Use the expansion tubes and long screws for fixing the longer bracket arm onto the wall, and short screws for the other bracket arm onto the wood board.,Multiple DIY Purpose. Meeting your various creative idea for home improvements, such as bookshelf, kitchen shelf, exhibition stand, garden shelf, garage workbench, external wall brackets, and more storage shelf projects.,Package Includes. 2x shelf brackets, 4x expansive tubes and 10x tapping screws. If any problems with your YUMORE products, please feel free to contact us, and we will offer a Refund or Rechange with pleasure. Just enjoy this absolutely RISK-FREE purchase