... be circumvented relatively quickly by humans with tools, while penetrating razor wire barriers without tools is very slow and difficult, giving security ... forces more time to respond. Razor wire contains a core hardened steel strip that is often under ... ±1, 45±1, 40±1, 100±2USE Type A - Concertina razor wire Outside dia.:450, 500, 600, 700, 800, 900, 960, 980mmNo ...