Crystal View™ dome mirrors help prevent accidents at blind corners, intersections, and exits. They are an excellent tool for monitoring assembly lines and production machinery. Dome mirrors are also a good deterrent to pilferage and theft. Full 360 degree ceiling-mounted dome mirrors are excellent for four-way intersections or large-area panoramic viewing. Half-dome 180 degree mirrors are good for 3-way T-intersections. Quarter Dome 90 degree mirrors are ideal for improving visibility at 2-way, L-intersections. Mount them on corners, walls or ceilings.