ScrewPhilic magnetic Screw Chart Mat for iPhone 4, 4G and 4S, 4GS CyberDoc LLC USA ScrewPhilic magnetic Screw Chart Mat for iPhone 4, 4G and 4S, 4GS USA This magnet chart mat is double sided, one side is iPhone 4 the other side is iPhone 4S. 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. ScrewPhilic screws chart weights 5.2 OZ with length of 9 X 12, comes with double sided strongly magnetized both side.