Forged in Fire S04E20 - Tabar-Shishpar

Four bladesmiths have a monkey wrench thrown into the competition, literally, when they are asked to forge blades in their signature style from pipe wrenches. Which parts of the wrench get used and which should get thrown away as the clock ticks down? Ultimately only two competitors' pipe dreams stay alive as they advance into the final round where they must recreate an extremely rare axe-mace hybrid, known as the Tabar-Shishpar.