Description Material: Ruler: aluminum alloy Clamping baffle: aluminum alloy Screw: Stainless Steel Lock Nut: Plastic with Brass Reinforcements What You Get: When you purchase the product, you can get 2 x Triangular Ruler, 4 x Set Screws, 4 x fixing clips, 4 x nuts, it will be a good helper for your fixer and will be omitted. It's time to choose the accessories Wide range of applications: The square positioning ruler kit is made of high quality aluminum alloy, and the right angle positioning ruler is durable and has a long life. Suitable for carpenters, handymen, construction workers, right angle/90 degree wood/metal welding etc. Dimensions: Square ruler kit measures approximately 123 x 123mm. There are more different holes for fixing, which makes your work more convenient, small in size and light in weight, and the square positioning ruler is easy to carry. Right angle clips: our kits Square positioning ruler sets feature true right angles inside and out. Grinding ensures straightness and parallelism, and there are different hole positions for fixing to ensure your work is more convenient. Note: Due to manual measurement, please allow slight error. Thank you for your understanding. Monitor is not calibrated same, item color displayed in photo may be showing slightly different from the actual item. Please refer to the actual Good quality product