Razor barbed tape is a type of modern security fencing material fabricated with razor-sharp stainless steel blade and high-tensile galvanized wire. The multiple bladed edges of a razor wire fence are designed to inflict serious cuts on anyone who attempts to climb through one, and therefore have a strong psychological deterrent effect. The diameter of the razor wire coils can range from 18 inches to 60 inches, while 30-inch products are among the most often specified for medium or high security applications. Concertina configuration is available, which makes the razor wire barrier much more dense and difficult to penetrate.