Door hardware allows doors to open and close so people can pass through an entryway. They may also allow the door to lock in order to restrict access to an area. This hardware includes door locksets, exit devices, strike plates, door thresholds, ramps, knockers, and viewers. Other door hardware and components include door closers, operators, guards, sweeps, weatherstripping, and stops and holders that keep doors open, pull them closed, or keep dirt and debris out of buildings. Garage, sliding, glass, and screen door hardware install parts and components and keep doors in good working order.