Stack of books next to pencils in a holder and a camera.

About Citadel Designs

Holdoor is a portable door blocker installed at the bottom corner of the door on the doorknob side. When deployed, its spring-loaded blade drops down and digs into the ground, helping stop forced entry attempts by resisting the door from being pushed open. Unlike traditional door security devices, Holdoor can even be activated while the door is still open or ajar, providing continuous protection as the door closes. Its compact design makes it ideal for home security, apartments, hotels, offices, classrooms, and emergency lockdown situations.

Our Passion

Our mission at Citadel Designs is simple: to help protect the innocent. We believe safety is a right, not a luxury, and we’re proud to design products that help people feel secure in the spaces where they live, learn, and grow.

Safety Products by Citadel Designs

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