Straightened Line Razor Wire Fencing Straightened line razor wire works well as top linings for fences of various types. It is easy to be installed in many ways. Straight line barbed tape wire is installed quickly. It can save cost and at the same time achieve the effect of frightening and stopping. Materials: Galvanized steel, stainless steel The blade types and sizes are the same with concertina coils while it is supplied in the form of straightened line.