1. Connect the fixed device and bracket: Expand the elbow fixed device, set the target object, and then rotate the fixing part (circle) outward to make it able to put it in the slide of the bracket.
2. Adjust the fixed device: Adjust the slider of the elbow fixed device to the position suitable for your arm ulnar to ensure that the elbow joint can move freely.
3. Test the fixed device: Put your arm on the bracket to ensure that the elbow fixed device is firmly fixed to hold the arm firmly.