The ServoCity Brass, 32P, 20 Tooth, D15T Spline Servo Gear is designed to fit securely onto the splined output shaft of Hitec Large Size servos. It ensures precise alignment by using the stock servo screw to secure the gear in place. This gear is typically paired with a 76 tooth hub gear to achieve a 3.8 reduction ratio, facilitated by the Actobotics Channel's hole pattern. Constructed from brass, it features a 20° pressure angle and is patented for its innovative design.