CNC-machined 81mm CVD drive shaft with 2.5mm pin made from world-renowned HUDY Spring Steel. The drive shafts are some of the worlds thinnest yet most durable drive shafts used in electric off-road cars. Hardened with a proprietary hardening process, the drive shafts provide unbeatable lifespan and reliability. The CVD assembly also features a composite safety collar to keep the mounting pin securely in place.