Barbed Wire

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. It is used to construct inexpensive fences and is used atop walls surrounding secured property.It is often coated with zinc,having barbs evenly spaced along them;used to construct agricultural and military fences. It is also a major feature of the fortifications in trench warfare.
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 by an unskilled person. 

Barbed Wire