Make customized block and component families of outdoor equipment and furniture catalog for use in AutoCAD design software. CAD blocks? CAD blocks are named groups of objects that act as a single 2D, or 3D object. CAD blocks can be used to create repeated content, such as standard details, drawing symbols, and common components. CAD blocks help you save time, maintain consistency, and reduce file size, because with using them, you can reuse and share content continuously. You can insert a block into a CAD drawing either by specifying a drawing file or block definition within a CAD drawing file. Afterward, you can easily move, copy, rotate, or scale it.