The Tactical Door-Viewer was developed with the help of the law enforcement industry to help officers assess potential hazards behind dwelling doors. Simple to use, the officer places it over the peephole in the door and can look into the dwelling without alerting anyone inside. They can assess any potential threats or activity before proceeding with their mission. The Tactical Door-Viewer housing is a strong, lightweight composite with an all-weather coating, and the lenses are custom-designed, high-quality, precision-ground glass. It is lightweight and easy to use. An officer can carry it on a web belt, vest or in a pocket. The viewer from Secure Concepts fits most common peepholes used in the United States for apartments, condominiums and houses.