D100 - 90° Outside Metal Corner Bead, 10 ft. (Box of 25) To finish 90° outside corners that require extra protection. Benefits: Made out of fire-resistant (ASTM A653) galvanized steel. Excellent protection and precision. Holes and knurled surface to allow for excellent adhesion to joint compound. Can be applied using nails, screws, or cinch-on tools. Bailey Metal Products Trims Brochure