This SWORKz aluminum steering servo horn is designed for 1/10 scale 2WD vehicles using the Uni-Design System and fits a 25-tooth servo spline. The horn is machined from aluminum for a rigid, precise connection between the servo and steering linkage. It includes two mounting screws and installs with a clamp-style split collar for a secure hold on the servo output shaft. Features: 25T servo spline compatibility Aluminum construction Clamp-style split collar design Includes two mounting screws 7/7/26 cs