It is made of light and durable aluminum. Ruler used for 45 ? 90 ? checking and 45 ? alignment marking work. You can check the angle of 45 ? 90 ? at the same time. A line of 15 mm width can be drawn. Product size / length: 168 mm, width: 63 mm, height: 73 mm. Product weight: 90 g. Package size / length: 210 mm, width: 100 mm, height: 80 mm. Package weight: 115 g. Material: Body: Aluminum. 90 ? 45 ? Accuracy: 0.2 mm or less per 100 mm. Length tolerance: + - 0.2 mm. Shinwa Rules Co., Ltd. (Shinwa Sokutei) is the leading manufacturer of measuring instruments having the largest share in Japan in the field of metallic scales. Shinwa Sokutei manufactures metallic rulers as flagship products and variety of measuring instruments, and provide them through distributors around the globe. Their products are mainly used for measuring architectural materials in the construction industry and highly reputed as excellent design with user-friendly functions by builders. Also, many professionals working in manufacturing plants and inspection institutions are satisfied with Shinwas products lengthy durability under harsh environment. Shinwa Sokutei, which began with the manufacture of metal rulers in 1971, has pursued "measuring" since its founding. The desire to enrich the lives of many people by "measuring" is the origin of Shinwa Sokutei. [Product lineup of Shinwa Sokutei] Curved Scale, Straight scale ? machine scale, aluminum straight Scale, straight Scale made of resin, straight Scale made of bamboo, protractor, micrometer, convex, tape measure, surveying equipment, scale, level, laser ? Optical equipment, sanitization ? standard setting tool, Round saw ruler, building tool, factory tool, thermometer ? hygrometer ? environmental measuring instrument, outdoor equipment, loupe, drafting supplies, magnet.