This is a set of two Traxxas XX-Long Hardened Steel Shock Shafts, and are intended for use with Traxxas Slash and T-Maxx trucks. 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 help prevent bending.