Expanded metal corner bead is a durable and versatile construction material used to reinforce and protect external corners in drywall and plaster applications. Made from galvanized or stainless steel, it features a mesh-like design that enhances adhesion for joint compounds and plaster, ensuring a strong bond and smooth finish. The perforations allow for easy keying of finishing materials, reducing the risk of cracks and ensuring long-lasting durability. Commonly used in residential and commercial construction, expanded metal corner bead provides straight, clean edges while increasing impact resistance in high-traffic areas.