Strong and Reliable: Industrial black mounting brackets are made of high quality cold rolled steel with multi-layer surface. Treated with black baking varnish, high corrosion resistance, anti-corrosion, moisture-proof, rust-proof. Smooth surface and edges, no burrs. Large Load Capacity: These stainless steel brackets are cast in one piece at 90 degree angle for extra strength and break resistance. Thicker brackets provide greater load capacity and longer durability. li> < li>Counterbore Hole Design: The screw hole is countersunk; the screw head will not fall off, and the appearance is simple and beautiful. Screws not included. Note: The data is all measured manually, please allow an error of 1-3cm. Due to the difference in light and display, there may be a certain color difference.