Building hardware, interior fittings & exterior materials include a wide variety of products. Building hardware includes foundation components, joint hardware, building materials and plates, being used both for interior fittings and exterior materials. Interior fittings include door handles and door closers, handrails for stairs, and sanitary and lavatory products for wet areas. As for exterior materials, there are various products necessary around entrance, garden, parking lot, etc. Building materials include products that can be used not only for housing but also at production sites; however, the required properties of those vary greatly according to the installation location and situation. It is necessary to select appropriate parts for the usage environment.