The edge ruler provides unparalleled accuracy for panel layout work. Simply press the head to the desired angle and draw along the straight edge. The woodworking ruler head adjusts between 0° and 70°, locking securely every 5°, including 22-1/2° and 67-1/2°, for precise angle and length reference. The surface features laser-etched scales that are clear, easy to read, and designed to minimize parallax error. To use, place a pencil in the notch and guide the tip along the barrel edge to create perfect parallel lines. Both edges of the ruler blade are marked with 1/32 inch graduations, with total scale error held within 0.004 inches over the full length. Ideal for engineering, angle measurement, student drawing, architectural design, length measurement, and suitable for students, carpenters, architects, and designers.