Use this product when your Nintendo Game Boy Color game cartridge shell is cracked or damaged. Gamers who love their classic Game Boy Color games can benefit from this. The shell is a custom molding, almost identical to the original. It's a TYPE A design for compatibility with original Game Boy Color Game PCBs. There's a securing screw included. The casings simply slide apart and are secured with a single screw. A tri - wing screwdriver (not included) is required to open the original cartridge, and a tri - wing or philips screwdriver (not included) for installation. Please note it may not fit custom or non - original PCBs.