This is a MIP X-Duty c-drive it for the Axial SMT10 Monster Truck. When you first see the Axial SMT10, you're likely to think Nobody told me Axial has a shrink ray! And they may as well because the SMT10 brings the larger than life power of the Grave Digger to your fingertips. One crucial component is missing, unfortunately, and that's MIP X-Duty c-drives! MIP's all-steel X-duty splined driveshaft is a tried and true center driveshaft that hobbyists all over the world have trusted for years. Due to the large wheels on a Monster Truck, the necessary torque and resulting fatigue that the stock shafts experience are extreme, so a stronger center drive shaft will be needed sooner rather than later, so replace it now and save yourself the hassle of doing it later!