Westcott Drafting & Drawing Tools are some of the finest products of their kind for students & professionals. The commitment to meticulous quality & cutting edge innovation in measurement & art materials has earned an unparalleled reputation. Feature-packed ruler is ideal for home, school, office & shop. Precisely scaled in 1/16 on one side & millimeters on the other. Features raised beveled edges to eliminate smearing & extra margins at the ends for clear starts & stops. Plumb lines at ends aid in drawing or checking right angles. Hang-up hole. Ruler Type: Standard / Metric; Length: 6; 15 cm; Standard Scale: 1/16; Metric Scale: Millimeters.