Forestadent Snap Lock Expander
1. The Snap Lock Expander does not turn back unless the doctor or patient turns it back. After the activation of the spindle (Fig-1), the flat spring snaps in (Fig-2).
2. The hole in the spindle is always in the right place for reactivation.
3. When properly activated by 1/4 turn, both the patient and doctor will be able to feel the screw lock.
4. If overactivated, the Snap Lock Expander can be turned back.
The spring pushes the excentric spindle. This makes the spindle snap into an ideal position for reactivation and lock it.