What is the proper tool to unscrew this type of screw? [closed]

What is the proper tool to unscrew this type of screw? [closed] - A Vintage Typewriter

I bought a portable stove for my travel but it broke and I tried to open it. But one of the screw looks like this. I have no idea if the manufacture put a abnormal screw. How do I unscrew this?

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Best Answer

It's a fairly common form of "tamper proof" head, you need a bit that looks like a regular flat blade but with a slot in the middle. I think it's sometimes called a "spanner head". In my experience most "security bit sets" contain that style of bit in a variety of sizes.




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