Used in the steering gear output shaft or DC motor shaft, drive to play the role of the fixed side of the hole with the top wire.
You can also do the crank rod.

Specifications
Material: CNC Aluminum
Head with an M3 Thread hold, come with a screw
Middle hole diameter:3mm
Arm hole diameter:2mm
Maximum Thickness: approx. 8mm
Arm Thickness: approx. 2mm
Maximum Width: approx. 11mm
Total Length: approx. 48mm
Distance from hole center to hole center: approx. 16mm,21mm
Color: Gold

Package Content:
1pc x Aluminum Servo Arm with Screw