A barrier known as a triple Concertina wire fence consists of two parallel concertinas joined by twists of wire and topped by a third concertina similarly attached.

A barrier known as a triple concertina wire fence consists of two parallel concertinas joined by twists of wire and topped by a third concertina similarly attached.

This in turn has led to some people trying to differentiate between concertina wire and "constantine" wire by assigning the term "concertina wire" to what is commonly known as razor wire.

This in turn has led to some people trying to differentiate between concertina wire and "constantine" wire by assigning the term "constantine wire" to what is commonly known as razor wire.

Today, concertina wire is factory made and is available in forms that can be deployed very rapidly from the back of a vehicle or trailer.[6]