Corner bead is used to create a smooth and rounded finish on exposed edges of wallboards. Corner bead is excellent for use with fast setting joint compounds for easy finishing. The product provides protection from edge chipping or cracking. It has pre-punctured nail holes for quick and easy installation with drywall. The expanded diamond mesh wings allow for keying the plaster right up to the nose of the bead. The expanded corner bead provides plumb reinforcement at corners.