These are the Traxxas Hardened Steel Shock Shafts (32mm) for the Ford GT, Mustang GT, and 4-Tec 2.0 AWD Chassis Cars. Also works on Nitro 4-Tec.
These hardened, ground steel shafts have a super tough titanium nitride coating with a micro-polished finish that reduces stiction for smoother performance and resists scratching for much longer shaft life. The special hardened ground steel is extra strong to prevent bending.