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

corner bead is 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 made construction easy and may save plenty of time .