Kaisi Gamebit Screwdriver Set 3.8mm and 4.5mm Security Screwdriver Bit for Opening Nintendo, Sega Consoles and Game Cartridges

works great

These tools 0.45 and 0.38 are just right for repairing game systems. The 03.38 driver opened my nes cartridges and game boy cartridges. Important to remember, the screws are small and you need to be gentle and seat the tool level with the screw heads when removing and tightening them, kind of like watch repair. Never forced. The bits fit snugly to screws so force will strip or break them. I like these because they have handles. The length is enough to grip spin screw in place. Use your fingers to spin tight so you feel the screws bottom out to close cartridge. I like good hand tools not bits that can get lost.

Specialty tool for specialty project my son was working on. Said it worked great and helped him rebuild a "vintage" Nintendo.

Bought these mainly to open and clean Nintendo consoles and cartridges. They fit well and do not strip the screws. Well made and a good price for when I need to use them.

Used these items to open up my Nintendo GameCube and worked as expected. Was able to repair my system thanks to these tools. Comes in a pair which makes it even better to have a backup.