Metal gears were used to create a durable gear train that is easily serviced, and the plastic case with aluminum center section keeps the servo running cool while remaining lightweight. Plus, the digital circuitry allows compatibility with vehicles that use traction control/gyro systems, making the WP120T a viable option for models that are equipped with a stability system. Want more? We back it with a 1 year warranty - so grab a handful of throttle and drive with confidence knowing that the weather is not going to slow you down.