This Nintendo Nut Driver set includes security bit screwdrivers in size 3.8mm and 4.5mm. Extra large handles for ease of use, much easier to use than bits. Allows for opening and internal cleaning of games and consoles as well as battery replacement. Comes in high quality CRV6150 steel, more durable than "heat treated", "hardened", or "carbon" steel. These two screwdrivers, you can open many vintage consoles and games by Nintendo and Sega. Some examples include: Original Nintendo (NES), Super Nintendo (SNES), Nintendo 64 (N64), Virtual Boy, Original Game Boy, Game Boy Color, & Sega Game Gear, Sega Genesis, Sega Master System, & Sega 32X, Super Nintendo, Nintendo 64, Game Cube, Virtual Boy, Game Gear, TurboGrafx 16 and TurboDuo.