A barbed wire metal fence is a security barrier made from strong metal posts and wires with sharp barbs spaced along the wire strands. The fence typically consists of multiple horizontal wires stretched tightly between metal poles often topped with additional coils of barbed wire for increased protection. The sharp barbs are designed to deter and prevent unauthorized entry by causing injury upon contact. These fences are commonly used in agricultural settings to control livestock and in high security areas like prisons military bases and industrial sites to restrict access. Barbed wire fences are known for their durability effectiveness and low cost.