Servo Horn Overview: This is an optional EcoPower Aluminum Clamping Servo Horn, intended for use with EcoPower 860T servo along with other 15T splined servos. This extremely tough servo-horn has been machined from a solid block of aluminum for incredible precision, rigidity, and durability. The horn features a clamp type design that grips the servo’s output shaft so if the retainer screw comes loose, the horn will have a better chance of remaining in place, increasing your chances of finishing the race! Features: Clamping design 20mm, 25mm and 30mm hole spacing (measured from output shaft screw hole, to linkage rod holes, center to center) Dimensions (LxWxH): 43x12x8.5mm 5mm thick arm 15T Spline EcoPower Output Shaft Linkage holes threaded for 4mm hardware Includes: (1) Servo Horn (2) 3x8mm Screws (ECP-3112)