Full Scale - 7 mm Regular Curve - Fixed Tip Pen. With each depression this tip outlines a 7 mm wide full scale with a regular curve. It actually pushes down the wood behind the scale, leaving a clean, raised scale of uniform size.
#20 tips in sizes up to and including 6mm Regular curve, 8mm Flat curve, and 5mm Deep curve have a steel blade welded onto the tip as shown above. Larger tips are formed completely from tip wire and are not as strong as the smaller steel-blade tips.