The Steel Edge AlumiCutter has an imbedded steel cutting edge designed for safe, heavy-duty cutting with a razor knife or rotary blade. Made from the highest quality aluminum for ultra smooth edges and a solid feel without flexibility. The black anodized finish has a satin like feel. The photo-anodized calibrations are permanent and will not clean or rub off. The raised edge and finger groove protects your fingers. The non-slip backing keeps it positioned with just a touch while the surface will not nick or catch.