acceptable screws
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The worst one I ever came across was five lobe tamperproof on a Seagate external hdd. Couldn't find any bits for it that didn't have to be imported. Ended with a rather destructive disassembly
Pentalobe screws are used by Apple, was surprised not to see them listed. They also use a strange tri on some old batteries.
Best is to mold one directly from the screwhead using molten iron issued from your local weaponsmith.