This Koswork 25-tooth aluminum clamping servo horn is designed for Futaba, Protek, and Savox servo splines and measures 18mm in length. The clamping design uses a pinch bolt to secure the horn firmly to the servo output shaft, reducing slop compared to standard push-on horns. It is a metal replacement servo horn suited for Tekno 1:8 platform builds. Includes the horn and a single hex-head clamping bolt. Features: 25-tooth spline fits Futaba, Protek, and Savox servos Clamping bolt design for secure, low-slop fit 18mm arm length Aluminum construction Includes clamping bolt 7/7/26 cs