
Bought to unscrew the battery cover of a cheap plastic flashlight. It was completely beyond our strength - the screw didn't give in at all, it just ripped off, lots of small metal chips. Once you use it and apply force, the small "reversible" heads stay in place permanently, allowing the other side of the tip to stay inside. It was an upsetting experience. I've attached a picture of the screw I had to loosen, but I can't because it's a useless piece of junk.

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