This Kyosho aluminum servo horn is designed to fit FZD2, 17-21 tooth, and 23 tooth servo splines, giving you flexibility across multiple servo configurations. The anodized red metal construction offers a more rigid and durable alternative to standard plastic servo horns. The set includes the servo horn, a locking nut, and a mounting screw. Features: Fits FZD2, 17-21T, and 23T servo splines Rigid metal construction Includes locking nut and mounting screw Anodized red finish 7/7/26 cs