Awls, scribes and dividers allow you to make layout marks in your workpiece. Awls and scribers create guidelines later followed by a chisel or groover. Divider Calipers allow you to mark the circumference of a circle, measure the distances between two points on a set of blueprints. Dividers have sharpened tips that allow you to punch or mark your workpiece. There are awls, dividers and scribes available to mark wood, plastic, ceramic and sheet metal.