Shelf brackets are parts to support shelf boards. Some are used in combination with shelf poles, but some are mounted on the wall independently. The dowel type that pins are inserted into holes and the clip type that shelf brackets are hooked into grooves are mainly used in combination with shelf poles; the bracket type that shelf brackets are mounted with screws is used both in combination with shelf poles or independently. To support the weight of the shelf board and the objects put on there, the shelf brackets are often made of stainless steel, zinc, aluminum and other high-strength metals, and vary in size for the place to mount and the purpose of use. It is necessary to check the model numbers, sizes, etc., beforehand to prevent unfitness due to the differences of the standards between the shelf bracket and the shelf pole, the shelf board and other parts.