2PCS 18T Metal Servo Arm Horn Round Type Disc Steering Servo Horn for 60KG 80KG 150KG Servo Motor Compatible with Futaba Servos RC Robot Car Airplane Parts

While these aluminum servo horns definitely add weight over a plastic alternative, they're well worth it. If you've ever stripped, cracked, or otherwise destroyed a plastic horn, you'll understand why these are so great. Tapped threads mean you know you're securely attaching whatever it is you're moving, and there are enough holes you can find a way to mount almost anything. Well made, and easy to use, these should be a part of any project where you have a few grams of weight to spare.

Lightweight and comes with enough screws to connect to most anything in your build kit. Just make sure you have the correct amount of teeth on the gear when connecting it to your gear.