The four sides of this Lockable Weatherproof Frame open sequentially. The last profile is held in place with a screw on top that can be opened with its key. This system ensures your poster is never accessed by unauthorized third parties. Please use the pull sticker to take off the cover. Place the poster inside the water wick around the inner frame. Suitable for outdoor use. Each frame includes an Allen key to open the locked profile. Each frame includes wall mounting; 4 screws and 4 pegs. Optional hangers help easy mounting. Suitable for silk screen printing, maximum letter height is 0.69" (16 mm).