1. There are two screws which you need to use any screw driver between 1.0-1.4MM to remove and unscrew them.

2. You need to use punch pin to remove the cap on the clasp first. Then insert the strap to the clasp.

3. The Small tiny tubes are easy to lose/miss when you try to remove the cap from the clasp.

4. The Stick(Tooth) of the cap is weak and easy to damage or break. Do not try to force or pull the strap with the clasp.