1. Position a flathead screwdriver, or any adjustment tool, into the slot on the clasp.
Lift the bar with the tool facing towards the tall end of the strap to release the clasp.  
  
2. Shift the clasp into desired position.
The clasp can also be engaged beyond the indentations provided.
   
3. Press the bar down into position to lock the clasp. 
  
4. To secure the strap upon wearing, always ensure the hook is over the pin.
Snap the flat clasp closed, the close the security clasp.