Lighter, stronger and safer than glass mirrors. 3mm thick with polished edges. Supplied with pre-drilled holes and 4 chrome domed screws. Can be used in any indoor or outdoor space. WALL MIRRORS For additional safety in schools, senior citizen and impaired ability residences, a safety film backing is applied to all glass mirrors assisting them to stay in one piece if broken. Acrylic mirrors are ideal for use when a safety mirror is required. Do not use abrasives when cleaning.