Abstract: A prefinished corner bead for application to finished interior walls, which may be utilized on either inside corners or outside corners, and which may take on any number of different configurations, any of which would provide a recessed face which is configured to accept a variety of decorative or ornamental finish trims. The prefinished corner bead is manufactured in such a manner that an expansion joint is provided which helps eliminate cracking and displacement of finished wall surfaces due to the expansion and contraction of structural surfaces.