Was cleaning too many cartridges on a regular basis, so I recently decided to buy a set of security screwdrivers to clean video games for nes, virtual boy, and sega nomad. Security bit tool kit included 3.5mm, 4.5mm, xbox driver, and some other security bit drivers that I can use on my computer servicing hobbies. The set does an excellent job with all gaming systems and surprisingly with servicing Verizon Motorola STB also. A straight winner in my opinion.