From Tekno RC:
The new Tekno RC Aluminum Servo Horns are designed to minimize force transmitted to the servo in the event of a hard landing or crash. They utilizes a bottom mount design that, as opposed to a top mount, lowers the leverage point and helps increase the life of the servo top bearing and gears. This means your servos will be better protected and keep you in the race!
There are two mounting positions to fine tune your application and a hefty M3 locking screw ensures the servo horn will never come loose again. The M3 screw is also easy to tighten compared to the smaller M2 screws that can be easily damaged. Use TKR1325 (M3x14mm flathead screw) for mounting the steering linkage to your Tekno RC vehicle along with thread locking compound on all metal-to-metal connections.
These were designed specifically for the Tekno RC line of vehicles, but they can be used in most other applications as well.
**We strongly recommend using the inside (short) mounting hole for use in Tekno RC vehicles. This will smooth steering response and improve the life of your servo.
TKR5251B Aluminum Servo Horn (23T spline) – $15.99
TKR5252B Aluminum Servo Horn (24T spline) – $15.99
TKR5253B Aluminum Servo Horn (25T spline) – $15.99