Gamebit 3.8 & 4.5mm security tool bit set for game cartridges & consoles Inc Nintendo NES, SNES, N64, GC, Game boy, Sega Master system, Mega drive, Game Gear | ZedLabz

They do fit on to the screws on the devices (sega), but the other end that goes in the screwdriver doesn't seem to fit that well, its extremely tight/wont go into most screwdrivers (I tried 3 different ones)

Works perfectly as most zedlabs stuff does used mine to install GameCube modchip and replace Gameboy batteries

These bits get a good fit so far and have allowed me to get to work on an N64 that's seen better days.Can't complain about them, not super hard extra wonderful bits but they'll only ever be undoing these security screws from plastic cases. they also round out a pretty complete set of security bits for me, letting me in to the vast majority of problem items.

Can't fault them, opened up some old Mega Drive cartridges with no issues.

The tool originally sent to me had been built incorrectly with the screwdriver part in the handle instead of the head, so it couldn't fit into the holes to reach the screws in Game Boy and N64 cartridges. Beware that this can happen, but to be fair to the seller, they sent a replacement as soon as I filed a complaint.A medium rating because the tool didn't work but was replaced.

I used this to open a Sega game gear so that I could replace the capacitors. Feels robust and is a good price.

Even though I no longer needed them once they had arrived, the item is as described and are very well made.

I found these to be the cheapest and they did exactly as intended - opened my N64 to clean and release the reset button, and change the s-ram battery in the ocarina of time cartridge. They even turned up a day early too ... result.