Clear and accurate scale: Sharp graduations and precise markings perform well on any surface, reduces abrasion caused by long time use, preventing unnecessary eye strain. Wear-resistant and never fade. Fine workmanship makes this set look upscale and beautiful. Suitable for various occasions such as daily life, study, work, experiments, stationery, bookmarks, and home decoration. Ideal gift for kids, friends, and students.Wide application: This math geometry set is a useful tool for architects, engineers, draftsmen, builders, artists, designers, roofers, teachers, and students. Great back-to-school gift for children.Delivery quantity: 3 pcs Package contents: Only the items listed above, excluding other products Size: - 0-10 cm Brass Right Angle Triangle Ruler: 122 x 71 mm - 0-15 cm Brass Wave Ruler: 156 x 30 mm - 0-180 Brass Protractor: 102 x 57 mm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Color: Gold (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)