The somewhat euphemistically named process of “denailing” has remained a popular torture method since medieval times and, according to the sort of creepily detailed Wikipedia page for the method, it remains in use today.
There are a few good reasons for that. It apparently leaves no permanent marks or injury – after the nail grows back, of course – and requires only the most basic of tools to pull off. It also objectively hurts like hell and there’s something about the tips of the toes and fingers being manipulated that leaves a person feeling unbearably vulnerable.
All of which has us wondering why anyone would voluntarily use this tool, which is clearly just a re-purposed torture device, to fix their ingrown toenails, regardless of how amazingly well it supposedly works.