Featuring graduations on rust proof aluminum, these tools maintain accuracy for repeated use while remaining lightweight for school backpacks or art cases The Aluminum Ruler Set combines a straightedge, protractor, and two triangles in 1 versatile, perfect for precise measurements and creative geometry projects Tackle math homework at study desks, sketch architectural concepts in art studios, or measure craft materials during event with these strong, portable geometry tools Designed for students mastering measurement fundamentals and hobbyists crafting detailed technical drawings, this set bridges classroom learning with real world applications Engineered with rounded, edges to hand injuries, this essential measuring empowers little minds to explore mathematics and design safely while building awareness skills, Manufacturer: ZEPFJHE