Expanded metal mesh, made by cutting and stretching a metal sheet into a durable diamond-shaped grid, is common in residential and commercial properties. Typically constructed from steel, aluminium, or stainless steel, it offers excellent visibility and airflow while maintaining high security. The rigid structure is difficult to cut or penetrate, making it ideal for securing industrial facilities, machinery guards, walkways, and architectural designs. Coatings like galvanization or powder coating enhance rust and corrosion resistance. While it may not provide complete privacy, expanded metal balances affordability, security, and visibility, catering to various security and design needs.