The Spektrum S6510 is designed to give 1/5th scale enthusiasts huge torque (820oz-in @8.4V) to power through the toughest terrains. The S6510 is a perfect upgrade servo from RTR vehicles that includes the S905 or S906 servos, such as the ARRMA 1/5 Kraton 4WD BLX Monster Truck, Losi 1/6 Super Baja Rey, Axial 1/6 SCX6's crawlers and more.