Features: The Aluminum Ruler Set combines a straightedge, protractor, and two triangles in 1 versatile , perfect for precise measurements and creative geometry projects. Featuring graduations on rust proof aluminum, these tools maintain accuracy for repeated use while remaining lightweight for school backpacks or art cases. Designed for students mastering measurement fundamentals and hobbyists crafting detailed technical drawings, this set bridges classroom learning with real world applications. Tackle math homework at study desks, sketch architectural concepts in art studios, or measure craft materials during event with these strong , portable geometry tools. Engineered with rounded, polished edges to prevent hand injuries, this essential measuring empowers little minds to explore mathematics and design safely while building awareness skills. Specifications: Component : aluminum alloy Ruler: about 16.1x2.2cm Protractor: about 9.3x5.6cm Triangle ruler 1: about 6.9x11.9cm Triangle ruler 2: about 8.5x8.5cm Package Includes: 1 set x Aluminum Ruler note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.