See All N26 Circular Glass Indoor Convex Security Mirror, 26" Diameter (Pack of 1):Convex detection mirrors are easy to install - they are mounted simply and easily with the brackets provided in the container, just reference our convex mirror installation guide. The mirrors are equipped with a patented swivel assembly and are adjustable to most any position or angle. Wide angle vision permits you to see around blind corners, over center aisle gondolas and into hidden corners. Discourage shoplifters who need privacy before they risk a theft. Considered the greatest psychological deterrent by detective agencies, and endorsed by leading chain and department stores. They are on duty every minute of the day, and pay for themselves many times over in merchandise saved.