What Is Drywall Corner Bead?
A drywall corner bead is a building material used as part of the drywall finishing process. It is made from a thin strip of vinyl or aluminum that is bent at a 90 degree angle. The corner bead has a series of small holes in its surface that help it bond with joint compound or Spackle® during installation. This material is available in standard lengths ranging from eight to twelve feet (2.4 to 3.7 m), with each of the two sides measuring from 1 inches (25.4 mm) to 1.75 inches(44.5 mm) in width.