SAP Shelves (SAP 3) - The SAP shelves come in three differeny shapes, which can be installed in such a way that they work independently or in concert with one another. Because of their shape and hanging mechanism, a myriad different uses may be found for the sturdy SAP shelves. In addition to the flat surfaces where objects can be placed or leaned against, the SAP 1 features protruding strips on one end that can be used as coat hooks.