This is an optional Arrma 23T Aluminum Servo Horn. This horn is an optional upgrade for Arrma Felony and Infraction models, as well as the Kraton EXB and Mojave EXB rollers. This horn is anodized black for a sleek appearance and provides a strong. secure connection from the servo to your steering linkage.
 
Features:
Lightweight and strong aluminum for efficient servo operation and increased rigidity
Precision machined for accurate fit to servo splines
Anodized black and laser etched with the Spektrum logo for cool looks and increased durability
23T servo spline to fit Spektrum servos
Includes:
(1) Aluminum Servo Horn 23T Spline (Spektrum)