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Galvanized Razor Wire | Concertina Razor Wire Razor wire is made of high-tension galvanized steel wire and hot-dip galvanized steel sheet which is punched out sharp knife pieces. Due to the unique shape of barbed wire, it has excellent protection and isolation effect. Besides, the thick zinc coating makes it resistant to acid rains and all weathers so that it is very durable to use. Popular Types Razor wire is a kind of modern protective material. It is usually installed on the ground or wall as an effective barrier. According to the diameter of coil, concertina wire and razor wire are provided. Both of them are concertina-like and also have similar applications. However, concertina wire is often supplied in coils and has a larger diameter. The commonly used concertina razor coils can be divided into flat wrap razor wire, single-coil wire, and cross razor wire.