Metal Corner Beads is a rigid, pre-formed L shaped metal strip used in construction to reinforce, protect, and finish outside wall corners. Made from galvanized steel, featuring a 90-degree or bullnose angle with perforated or meshed flanges. Bridges the mechanical vulnerability where two drywall or plaster boards meet by anchoring directly over the joint. Acts as a heavy-duty screed guide for joint compound (mud) while shielding the edge from physical impacts. Covers uneven or crooked board cuts to establish sharp, crisp, straight 90-degree lines or rounded architectural profiles.