Functions: - The invisible shelf bracket is made of high-quality iron material, which is robust and durable. - The appearance is triangular. All shelves can be hung from the bottom of the shelf and hidden. - The triangular design is enough to be stable. You don't have to worry about the shelf wobbling or falling off. - Suitable for bedrooms, living rooms, balconies, dining rooms, offices, etc. - Ideal for bookcase brackets, cabinet brackets, furniture shelves, dividers and more. Product information: - Product Name: Floating Shelf Brackets - Material: iron - Thickness: 3 mm - Size: 100 x 80 mm / 3.94 x 3.15 inches Package includes: 4 x white wall shelf brackets. 16 x screws. Please note: - If you have any questions about using our metal shelf holder, please feel free to contact us, we will definitely offer you a satisfactory solution.