Metal products used in construction, such as: bolts, nails, screws (as in rough hardware); and fittings, such as, catches, hinges, locks, etc. (finish hardware); and tools. They are classified as: – ROUGH HARDWARE – Hardware meant to be concealed, such as bolts, nails, screws, spikes, and other metal fittings. – FINISH HARDWARE – also called Architectural Hardware, Builders’ Finish Hardware, Finish Builders’ Hardware. Hardware, such as hinges, locks, catches, etc., that has a finished appearance as well as a function esp. that used with doors, window, and cabinets; may be considered part of the decorative treatment of a room or building.