Phillips Everlast® Metal Corner Bead provides superior corrosion protection and mud adhesion. Metal drywall beads and trims are traditional reinforcement and finishing products used in gypsum wallboard construction. The most common metal trim is drywall corner bead. Corner bead is applied to 90 degree exposed outside gypsum corners with either nails, screws, staples, or clinched in place and finished with joint compound. Knurled and perforated flanges offer superior compound adhesion enhancing smooth, straight finishes.