【Stainless Steel】Our bracket is made of high-quality stainless steel. Stainless steel is hard and strong, not easy to break or deform, so it can fix your shelves firmly and stably. The surface of the bracket is smooth, burr-free, rust-proof, non-oxidizing, and durable. 【90° Right Angle Design】Our 5mm bracket features an L-shaped design. The L-shaped design enhances the shelf's load-bearing capacity. The L-shape extends from both sides of the shelf, allowing it to be securely inserted into the wall and keep the shelf stable. The 90-degree angle clamps are hand-polished and the screw holes are countersunk, with the screws flush with the bracket surface, resulting in a more aesthetically pleasing and secure installation. 【Corner Bracket Size】The package includes: 12 sets of metal corner brackets + 48 screws, size 40 x 40 x 18 mm, 3 mm thick, strong load-bearing capacity. Diameter 5 mm x 4 holes. Metal corner brackets have high load-bearing capacity, long service life, and can withstand daily wear and tear. 【Easy Installation】The screw holes are countersunk so that the screws are flush with the support surface. Metal corner brackets are 3 mm thick and are used to reinforce right-angle joints. All you need to do is drill the holes, install the screws, and tighten with a screwdriver. Simple, easy, and quick. They are perfect for your DIY projects. 【Extensive Uses】Shelf bracket suitable for stabilizing wooden doors, bed frames, drawers, furniture, cabinet doors, dressers, L-shaped metal corner clamps for building a frame, as an angle bracket it is perfectly connected to shelves, potted plants, tables and helps to securely build or repair installed furniture.