Rollup security doors are ideal for both commercial and residential applications. Applications ranging from shopping-malls, strip malls, loading docks, and parking garage entrances. Commercial rollup security doors, also known as commercial grille doors can be motorized, chain hoist or hand crank operated. To achieve the highest product quality, the aluminum grille doors are manufactured using solid aluminum bars (rather than hollow tubes) running the full width of the opening. The bars are then connected with vertical aluminum links, with single and double configuration, kept in place with aluminum spacers, resulting in a stronger more reliable door.