Quality upgrade throttle horn with locking bolts to prevent slip caused by plastic gears. Will fit Futaba servos and other 6mm diameter servo gears with 25 teeth. End to end length 46.78mm. Servo hole to furthest screw hole 20.06mm. For use with 3mm screws. To fit 25T cog servos e.g. futaba and JR. Standard servo fixing. Not suitable for 1.5 steering servos or 1.16 models.