CyberDoc M Magnetic Screw Chart Mat for CDMA iPhone 4, 4G CDMA CyberDoc LLC USA ScrewPhilic magnetic Screw Chart Mat for iPhone CDMA 4, 4G CDMA 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