Axial SCX10 Pro Comp Crawler Carbon Fiber Servo On Axle Mount. Constructed from super lightweight and rigid carbon fiber, this optional servo on an axle mount is intended for the Axial SCX10 Pro as a performance upgrade that will aid in eliminating flex to provide a more precise and direct steering without compromising the weight. This carbon fiber mount is a must-have upgrade for high torque servos that require extra rigidity than the stock composite mount!