Door accessories and doorway parts help users keep doors in good condition and maintain the comfort and security of their building. Door stops prevent door knobs and other door parts from colliding with nearby walls and damaging them. Door frame protectors, door plates, and door guards help prevent wear and tear on doors in high-traffic areas. Door holders and door wedges keep doors open for deliveries, air circulation, and more. Door closers keep doors closed when not in use to help maintain building security and fire-safety protocols. Door ramps cover thresholds to let machinery, carts, and other wheeled equipment pass over the threshold smoothly. Door viewers let users see who is at the door before opening it. Door bottoms and weather strips cover the gaps beneath and around a door to prevent drafts, dirt, and pests from entering the building when the door is closed.