Gamebit 4.5mm Screwdriver Tool is a security bit tool suitable for opening game cartridges with a recessed 3.8/4.5mm tool. The 3.8mm bit opens FOR NES, SNES, N64, FOR  GameBoy and FOR GameBoy Color cartridges. Whereas the 4.5mm bit opens FOR NES, SNES, N64 and FOR GameCube systems. This Tri-wing screwdriver works with anything that uses tri-wing screws.