Razor wire concertina

Concertina razor wire secure fencing, easy installation, age resistance, it is widely used in high-grade residence district, warehouses, prisons and in military fields and other sites requiring severe fencing and security. 

Concertina razor barbed wire is a type of barbed wire or razor wire that is formed in large coils which can be expanded like a concertina. In conjunction with plain barbed wire (and/or razor wire/tape) and steel pickets, it is most often used to form military-style wire obstacles such as when used in prison barriers, detention camps or riot control.