3.8mm Security Bit
3.8 mm Security Bit is used to open up your Nintendo NES, Super Nintendo SNES, AND Nintendo 64 N64 game cartridges to better clean the dirt and grime for better play. This step will help prolong the life of your systems Pin Connector and get your games working on the first try. You will receive game cleaning instructions on the NES games unless you specify you want the SNES or N64 guide . Item works best when used with the Contact Cleaning Eraser.