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Until now everyone has with traditional mild steel barbed wire for fencing purpose, but long research and development work has lead to the development of a suitable replacement ie barbed wire (razor blade equipment). The RAZOR EDGE CONCERTINA coils or PUNCHEDTAPE CONCERTINA wire coils are spirals squeezed from a sharp-edged ribbon to a spring steel core wire duly galvanized against corrosion. Any rotation of the coil has a number of concertina sharp edges (barbs) along its length at regular intervals