Concertina Fence

Concertina fence has been recognized a very powerful device to object unwanted entry of enemies or animals. Sharp blades and spiral structure can trap anyone who intends to go through or over the concertina wire.

Generally speaking, concertina fence is a combination of concertina wire and chain link fence or welded wire mesh which only blocks people out and will not hurt you (see Fig 1). This kind of concertina fence is widely found in prison, airport, residential, government and commercial area.
Concertina Fence