Shelf bracket is an overhanging member that projects from a structure such as a wall. A shelf bracket is a fastener used to hang a shelf on the wall. A bracket to support a shelf, a shelf wall bracket support projecting from a wall shelf bracket. This is the common examples that are often not really L-shaped at all but attach a smaller component to a larger and are still called brackets are the components that attach a bicycle lamp to a bicycle, and the rings that attach pipes to walls.