Profile: Arcus Inc. offers cutting systems. Our guide system can cut a perfect circle in plywood. Our circular saw blade guide system converts circular saw into curve or circle cutting saw. It cuts arches and round designs for remodeling and home improvement projects fast. The system includes a curved Arcus® professional saw blade that allows cutting arches or circles freehand with a circular saw. Our products are used in doorway arches, dome ceilings, round windows, arched windows, spiral or curved staircases, and curved sail boat building.