Video: I'm a total sucker for watching old tools get turned into badarse blades, because seeing random objects get weaponised is such silly dangerous fun. That used to be a thing that tightened bolts! Now it's a knife that will slice your eyes out. Plus, it looks cool as hell. This time, Miller Knives took a monkey wrench and forged it into a swashbuckling knife by the tried and true method of heating it up, bludgeoning it to hell and sharpening it into a deadly curved knife. The wrench's jaws act as the handle.