Each frame rests on a transparent block attached to an aluminum rod. A pair of flexible tubes slides firmly on the block retaining each frame in place.
Displayed frames are only retained by their bridge. This patented mechanism by Geocraft allows great display flexibility.
One may change the angle at which the frame is displayed by simply pushing on the tab. The displayed angle can be reduced by tilting the frame downwards.
When locking, a discreet lock penetrates into the hole at the front of the block. The pressure required to loosen the grip of locks is greater than 100 kg.