This is the Tekno RC Aluminum Servo Horn Double Hole 25T Spline.
Includes: Tekno RC 25T Aluminum Servo Horn with two Linkage Mounting Holes and M3 Screw
Requires: TKR1325 M3x14mm flathead screw (TKRC1325) to attach steering linkage and thread locking compound
Length from Center Hole to Opposite Edge: 0.95 (24.2mm)
Note: The inside (short) mounting hole is strongly recommended for Tekno RC vehicles for smoothest steering response and best servo protection.