Weight Capacity: 4 shelves mounted on a wood or brick wall can hold up to 200 lbs. These floating shelf brackets are made of 100% solid steel rods that are stronger than iron rods on the market and are powder coated to prevent rust and provide strong support. VALUE SET: The 8-piece Floating Shelf Brackets will meet your everyday needs and save you money. You can use these brackets on more shelves and save money. STABLE FLOATING SHELF HARDWAREThe brackets are hidden inside the shelves and the shelves will float. With hidden floating shelves, you can hang all your shelves without worrying about ugly metal fittings ruining your home decor. SAVE SPACE: Our floating shelf brackets are the perfect add-on storage solution for homes with limited space, great for kitchens, bathrooms, bedrooms, offices and more. Helps you maximize space savings, increase space flexibility and expand your home storage space. INSTALLATION IS QUICK AND EASY: Simply follow the simple instructions and use the Drill DIY tool to drill 0.39 inch diameter 4 inch deep holes in the shelves to mount the brackets to the wall on sliding shelves.