Invisible Shelf Support: Black metal support with a diameter of 15*12.5cm x 1.27cm. It is recommended to use wooden boards with a thickness of 2.5 to 4 cm. Robust Bracket The cast iron wall bracket makes it easy to secure and balance wooden frames. Improved Antique Shelf Bracket - Increased thickness of the metal support rods makes the shelf bracket stronger and can hold up to 50 kg. Wall Mounted Shelf Brackets Kit: These hidden shelf brackets are made of high-quality metal and come with all necessary screws. Powder coating improves corrosion resistance and prevents rust. Create a floating wooden wall shelf perfect for displaying your favorite memories and decorations Product dimensions: rod length 15.2 cm, diameter 1.3 cm, width 2.5 cm Backpack: 4 hidden hooks including screws and pins (wooden shelf not included) function: Multifunctional shelf hardware. These extremely sturdy floating shelf brackets work on all shelf types and are ideal for DIY shelves, allowing you to create attractive, versatile shelves anywhere in your home. save space. Our hidden floating shelf brackets are the best extra storage solution for homes with limited space. Designed by professional mathematicians and physics teachers, these metal brackets guarantee strength up to 200 pounds. In addition, the holes are correctly aligned to ensure optimal balance when tightening. We also offer heavy-duty reinforcement screws and expansion plugs to ensure stable support for many years to come._CA