Gamebit Screwdriver Kit. Contains: 1 x 4.5mm Game Bit / Jerrold #8 1 x 3.8mm Game Bit / Jerrold #6 1 x Screwdriver Handle fits both bits Opens the following: Consoles: SNES, N64, NES, Game Gear + Others Games: N64, Gameboy, Mega Drive, Master System, Game Gear + Others The tools are constructed from Coated S2 Carbon Steel. This makes them INCREDIBLY durable, far better than our old discontinued type which were plain steel. Those were hard, these are harder. We have run extensive tests on these bits, including destructive testing, with a drill driver using the highest clutch setting. Invariably, the screw gets stripped, but the damage to the bit is minimal. You will not find a harder gamebit.