yueton 2pcs 3.8mm and 4.5mm Security Screwdrivers Bit Set Open for Nintendo NGC/SFC/N64/SEGA Translucent yellow handles, easy to use Aperture: 3.8mm/ 0.15", 4.5mm/ 0.18" Used for dismantle NGC/SFC/N64/SEGA host machine, also can dismantle Wii power, NGC Power Allows for opening and internal cleaning of games as well as battery replacement Package included: 2 x Screwdrivers 3.8mm/4.5mm