Alumicolor 36" Steel Edge AlumiCutter ruler is a useful tool to measure and cut without changing tools. AlumiCutter's raised edge and finger groove protect fingers while cutting. The AlumiCutter works well with both hobby/craft knives and rotary knives for safe cutting. The recessed neoprene non-slip backing keeps the straight edge positioned with just a light touch. Constructed from extruded aluminum with calibrations using Alumicolor's photo anodizing process. Width approx. 1.53 inches. Silver.