How Interchangeable Jewelry Works - Twist Mechanism

The Twist Mechanism uses the concept of a screw to tighten the marble into place. To remove the marble, twist the marble at the top (by the screw's cup) to the left. This will loosen the marble from the mechanism allowing you to replace it with a new one. The mechanism opens and closes on a hinge. Replace the marble while the mechanism is open, then close and tighten by twisting the marble to the right. All you have to remember is "lefty loosey, righty tighty".