7 inch imperial silver triangular ruler, thickened 90 degree square ruler. Good material The triangular ruler is made of lightweight and comfortable aluminum alloy, which has good oxidation resistance and durability.Beautiful design User-friendly design. The aluminum carpenter's square has a thick overall design, which is safer and more meticulous and refuses to be scratched. The horizontal base design makes it easier to design the edges, smooth and practical. Scale is clear The scale of the metal ruler is clear. The printing scale is concave on the surface of the ruler, which is wear-resistant and durable. More applicable The protractor ruler is easy to use and comfortable to hold, suitable for linear cutting, professional design , decorative design, angle measurement, mechanical hardware industry measurement and office use. Note: The data are all measured manually, please allow an error of 1 within 3cm, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.