Barbed wire, also known as barb wire is a type of fencing wire constructed with sharp edges or points arranged at intervals along the strand(s). It can be used in a wide range of comprehensive security fencing constructions. It is used to construct inexpensive fences and is used atop walls surrounding secured property. Barbed wire was the first wire technology capable of restraining cattle.
A person or animal trying to pass through or over barbed wire will suffer discomfort and possibly injury. Barbed wire fencing requires only fence posts, wire, and fixing devices such as staples. It is simple to construct and quick to erect, even by an unskilled person.