The Hultafors 101204U Engineer's Folding Ruler is a precision measuring tool manufactured from downy birch wood with Swedish steel joints. Designed for engineering applications, this 78-inch ruler features an engineering scale with 1/10th and 1/100th of a foot graduations, alongside a traditional 1/16 inch scale. The engineering scale is typically found on the inside surfaces, with the inch scale on the outside surfaces. It is coated with a water-based protective lacquer to enhance resistance against dirt and moisture. The steel joints are heat-treated, coated, and oiled at three points to ensure flexibility and sustained performance. Each folding rule is individually inspected for accuracy. The manufacturing process adheres to ISO 9001 standards, reflecting its robust design suitable for technical drawings, civil engineering, and land surveying.