Doors and door frames add security for businesses or buildings that must be secured. Interior or exterior security doors protect your business or sensitive areas of your facility. Access doors conceal openings in walls or ceilings. Door protectors reinforce secure operation and prevent door jambs from damage due to vandalism. Folding doors and walls create partitions in large spaces for flexible use of space. Louvers allow air to circulate, and lite kits are windows that provide natural light or visibility through a door or wall.