Barbed tape or razor wire is a mesh of metal strips with sharp edges whose purpose is to prevent passage by humans. The name "Razor Ribbon" is a registered trademark of Allied Tube & Conduit Company, although through long usage the term is generally used to describe the barbed tape products of other manufacturers. While razor wire is much sharper than the barbs of standard barbed wire, it is not actually razor sharp. Even so, 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. In high-security applications, barbed tape supplanted barbed wire, which could be circumvented relatively quickly by humans without tools. In contrast, getting past razor wire barriers without tools is very slow and difficult, giving security forces more time to respond.There is little difference in the breaching time for a well-equipped opponent.