These wall mounted mirrors are the most effective convex mirrors to enable 180^o views in either direction at T-Intersections and corridors. The wide angle allows vision both left and right and are ideal at the end of corridors and retail aisles where shelving can create blind spots. Half Dome mirrors are mounted to the wall with the supplied dome capped screws and are essential for store surveillance above shelving. Especially useful in busy corridors such as hospitals, schools, warehouses and factories so that the risk of an accident is greatly reduced.