All the elements required to make a jigsaw puzzle of any size or complexity, left and right corners, horizontal and verticle mid sections in and out projecting edges, all flat or with a bevelled edge (see thumbs). Pieces are positioned as shown - no point in having a zero center! Formats inlude houdini .bgeo, .obj .dxf .iges .3ds - also includes original wire inter-lock edge for customization. Any variations you may require can be custom built by contacting : http://www.virtuallydone.co.uk