Abstract: Screwdriver apparatus for screwing-in, or unscrewing, two or more screws simultaneously. Gear linkage is provided to cause appropriate rotation of a plurality of appropriately-supported parallel shafts to simultaneously rotate and operate upon screws, such as two screws holding a line card in a router or switch within a telecommunications system. The distance between the parallel shafts is adjustable and under control of the user of the screwdriver. Any kind of screwdriver blade, such as Phillips, flat, etc., can be attached at the ends of the parallel shafts, and the blades need not match each other for any given usage. Rotational power for the screwdriver can be supplied by a human user or by a machine. Use of this tool facilitates adding or removing the aforementioned line cards, and saves technician time. Application of this tool is not limited to line cards.