Barbed/ Razor Type Concertina Wire is formed in large coils which can be expanded like a concertina. The Concertina Wire comes in coil form that consists of two oppositely wound helices which support each other against crushing while allowing easy longitudinal movement. The Concertina Wire is used to form military obstacles in conjunction with plain barbed wire and steel pickets. Barbed/ Razor Type Concertina Wire comes in different specifications to suit individual requirement.