The “PRAESIDIUM” expanding security shutter (stainless crossbow) came into existence as a direct response to specific needs,with the aim of introducing important innovations in the security door and window sector.

· Secure: effective anti-intrusion barrier for doors, windows and shop- fronts.
· Functional: secure and easy for both opening and closing
· Decorative:functional structure to reduce visual obstruction to a minimum.
· Versatile:simple elegant structure, which combines easily with different architectural styles.

These objectives have been successfully met.