This product is a heavy-duty 90° angle steel bracket that combines durability with elegant design. Crafted from high-quality steel with a thickness of 1/5 in. it can securely support up to 150 lbs. when used with the included high-strength screws. The precise bend ensures a perfect 90° angle, eliminating any possibility of tilting. Featuring a hidden countersunk design with a height of just 1.6 in. the bracket seamlessly blends into the gap between the wall and shelf, suitable for both upward and downward installation, while the countersunk feature ensures smooth drilling and invisible screws. The matte black finish on these cast iron shelf brackets marries modern sleekness with industrial aesthetics, serving as stylish blind shelf supports that offer a textured surface for rust resistance and long-lasting performance. This set includes 4-decorative L-brackets specifically designed for wood, making them ideal holders for DIY wall-mounted open shelves. Versatile in application, they are suitable for a wide range of spaces including kitchens, bathrooms, bedrooms, offices, garages, studies, and powder rooms. We are committed to providing excellent customer service. Should you encounter any issues, please do not hesitate to contact us, and we will respond as promptly as possible. Material: Metal.