This guy has an old wrench and he has an idea. He chooses to turn this wrench into a knife and the end result is something that you would not believe. He places the wrench into a furnace and he heats it up until it is red hot. He then takes a hammer and he smoothes out the handle of the wrench until it is flat. After this has been done, he sands down the edges and he sharpens it so it is probably sharper than any knife you have ever seen before.
You will need to see the video if you want to see what else he does because this is well and truly incredible and you would not believe how cool this looks at the end. He even adds his own markings to it to make sure that it is customised to his needs!