Space Between Corbels . Curves cut by bandsaw are called relief cuts. Any corbel or bracket you order from osborne wood products will have at least a keyhole slot routed directly into the wood on the back side of the piece. The Decorating Diaries Shabby Corbel Shelf Project from thedecoratingdiaries.blogspot.com Corbels are now a thing of the past, but how do you. Once level, press the corbel into place on the wall where you want it to be located. What this means to you is this: