Solid One-piece Structure: Every single bracket is formed in one piece with reinforced right-angle design, which make it sturdier and won't sag even after a long time. Solid Steel Material: The L shaped shelf brackets are made of 2mm thick solid steel, each pair can hold 120kg/260lbs on concrete walls. We suggest to add one bracket every other 50 cm for full load capacity. Decorative & Practical: The spray painted matte black surface keeps the brackets from oxidation and also make them look elegant. Use these black shelves brackets just about anywhere for a modern style look and extra storage space. Wide Application - The heavy-duty shelf brackets can be used to build a bookshelf, kitchen shelf, garden shelf, exhibition stand and much more. Perfectly fit into homes, offices, hotels, restaurants, etc. Package Includes: 4pcs shelf brackets (11.5 x 6 x 2 Inch) with 16 expansion bolts and 16 screws.