This hidden shelf bracket is made of solid steel with welded components, and is equipped with high-quality screws and expansion bolts. When installed on wall columns or brick walls, it can bear a load of up to 80 pounds and is suitable for shelves with depths ranging from 8.5 to 10 in. The bracket rod is 8 in. long and 12 millimeters in diameter. The back plate is 2 in. wide and 1-1/8 in. high. Each set includes 24 metal suspension brackets, 48 heavy-duty screws and 48 gypsum board anchor bolts. Its invisible design enables the shelves to present a suspended effect, which is both aesthetically pleasing and practical. It can make full use of the space and add a modern and elegant touch to it. It is suitable for various places such as kitchens, bathrooms, bedrooms, and offices.