1/2 in. Paper-Faced Metal Bullnose Outside Corner Bead, 10 ft. Used for creating smooth rounded outside corners. Dimensions: A,C - 5/8 in., B - 1 3/4 in., 10 ft. long. Benefits: Strong impact resistance. Forms superior bond with drywall compound. Suitable for use on 1/2 in. and 5/8 in. drywall. Reduces cracking along edges. Sheetrock® Paper-Faced Metal Corner Bead Brochure