Two heavy duty red plastic servo output arms (horns) that fit all KST servos with 5 mm diameter 25 tooth output splines. We think this is all KST servos between 10 mm and 12 mm thick. Note this does not include the KST X08 which is 8 mm thick.
Contains two substantial plastic output arms and retaining screws only. The distance from the servo output shaft axis to the holes ranges from 6.5 mm to 20 mm.