This accessory increases the versatility of the Hot Wire Cutter (785-1435, sold separately), allowing cuts in material from 1/4 to 5′ thick or to cut at precise angles. AN IMPORTANT NOTE: This tool and its accessories are designed for use with Woodland Scenics own high-density, nontoxic expanded polystyrene foam. Since many foam products emit a toxic gas when heated, this tool should never be used with ordinary Styrofoam, foam rubber or other foam products.