STANDARD 90° BENDING: In order to ensure that each shelf bracket can be at 90° to the maximum extent possible, we add a rigorous picking process before the shelf brackets are packaged. STURDY AND DURABLE: The shelf bracket is made of thick and heavy-duty iron, can support up to 75 KG, the floating shelf bracket will not bend, super durable, corrosion and rust resistant. FIT RANGE: This 0.5 CM thick shelf bracket fits shelves with a width of 20-25 cm. FOR WOOD & PLASTER & CONCRETE WALL: No need to worry about you can’t use our heavy duty shelf brackets on the wall you want to. These black shelf brackets can be used on wooden wall, drywall and hard concrete wall. COMPLETE ACCESSORIES & EASY TO INSTALL: Supplied with all the screws needed for different wall mounts. Also comes with a level for measuring as well as keeping the shelving hardware balanced during installation. (Board not included).