This is the ST Racing Concepts Heat Treated Steel Universal Driveshaft Set For the Traxxas Electric and Nitro Powered Slash 2WD 1/10 trucks FEATURES: Carrying over design and material selection from our HPI Blitz and Associated SC10 universal kits, our Slash 2wd universal kits features large diameter universal driveshaft bone for more durability against the power of today"s Lipo battery/Brushless motor combo, the heavier weight of short course truck, and larger diameter of short course truck tires. We also used the same carbon steel material for axles, which features two sets of universal pin holes so you can get twice the life out of the same set of axles. The universal joints and joint pins are of carbon steel material as well and the pins features a "step" for the setscrew to have a flat spot to more securely hold the universal driveshafts together. Lastly, even the universal shaft roll pin at the end was not over looked. Carbon steel at the pin although strong will unfortunately add excessive wear to the diff outdrives, thus a different material was selected just for the shaft pin for durability and ease of wear on the diff outdrives. INCLUDES: Two universal axles Two driveshaft bones Two diff outdrive cups Two 2mm long setscrews with 1mm hex socket Four 4.5mm long setscrews with 1.5mm hex socket Two 12x2mm hinge pins Two joints COMMENTS: The parts in this set can be obtained individually: Universal axles (STRC0002) Joints/pins (STRC0003) Driveshaft bones (STRC0004) Diff outdrive cups (STRC0005) This part set can be installed on Traxxas Slash 2WD VXL Brushless TQi 2.4GHz RTR (TRAD28**) Traxxas Slash 2WD TQi 2.4GHz RTR (TRAD19**) Traxxas Nitro Slash (TRAD77**) 10/10/12 phijwa