Corner bead may form straight side on the edge line of plaster project to fight break or chap and to protect and strengthen the most fragile part of the plaster. Its wing may enter the plaster in depthes in any edge line strongly.

Corner bead i very important for whitewash for plaster. using it in the construction of building and the finish of building may cause the corner place easy to destroy and make construction easy and may save plenty of time.