This two-handed melee weapon is made from scrap vehicle parts. An exhaust pipe forms the shaft, with the blade fashioned from a car bumper with the license plate still attached.
It has a special 'Mauler' attack, which does 50% damage and has a chance to knock enemies down or disarm them. This can be selected in V.A.T.S. at the cost of 38 action points (requires a Meleeskill of 50), or activated by running and holding down the attack button.