A razor wire is a metal mesh used for protection and anti-theft, usually made of steel wire or other strong material, covered with many sharp blades or hooks.
These blades or hooks can cut or snag any person or animal trying to climb or cross the rope.
Due to the strong structure and sharp blades, razor barbed wire is usually used in places requiring high security protection such as walls, fences, roofs, buildings, prisons, and military facilities.