Shelf support
A shelf support is a fastener used to hang a shelf from a wall. It can be an alternative to built-in shelving or adjustable shelving.
There are several different types of shelf supports. A very common variant is an L-shaped shelf support, which is also called shelf bracket, and can be seen as a subset of angle brackets. There are also other forms of plug-in shelf supports commonly used in a wardrobes or cabinets.