CyberDoc M Magnetic Screw Chart Mat for iPhone 4S, 4GS CyberDoc LLC USA ScrewPhilic magnetic Screw Chart Mat for iPhone 4S, 4GS This magnet chart mat is sing sided Losing screws? Having problem remembering which screw goes where? ScrewPhilic is essentially a Magnitized screw mat that allows you to keep all your screws organized in one place. M ScrewPhilic screws chart weights 1 OZ with length of 6 X 9 inch