Hultafors 101204U Engineering Folding Ruler, 1/10th, 1/100th, 1/16 in Graduation, Wood, Black/RedA folding rule manufactured from downy birch with Swedish steel joints, enabling thin sections and great flexibility. Engineering scale with 1 10 th and 1 100 th of a foot and a traditional 1 16 in scale with black and red markings. Swedish design since 1883. Unit: CD UPC: 315291012018 Model Number: 101204U