The Subterrain Layout System consists of rigid, high-density foam products that require no power tools, hammers or nails resulting in quick and clean construction. Installing wiring and switches is fast and easy. Easily add track risers and inclines with precise grades and any radius, for reliable train operation. Create contours, roads and crossings with this complete system of products and tools. Woodland Scenics Hot Wire Cutter (WD1435) recommended for cutting.