Features Double Layer Design: This double triangle ruler adopts double layer design, with thickness of 9mm, each with metric scale on one side and imperial scale on the other respectively, to meet your different needs. Multifunctional: This triangular square beam tool is multifunctional to keep your projects square and level, providing accurate and high-precision results for architectural designing, carpentry and more. Excellent Aluminum Alloy Material: This woodworking square ruler is made of excellent aluminum alloy material and is anodized for high hardness, rust resistance and erosion resistance. High Precision: This accurate carpentry square tool has clear calibration, which can reduce errors and ensure high precision measurements. Wide Application: This aluminum alloy triangular ruler has a wide range of applications and can be used to hold boxes, frames, etc. to assist in the process of creating the square. Specification: Item Type: Double Triangle Ruler Material: Aluminum Alloy Single Triangle Thickness: Approx. 9 mm/0.35 inch Red Size: Approx. 100 x 100 mm/4 x 4 inches Black Size: Approx. 150 x 150 mm/6 x 6 inches 1 x Double Triangle Ruler Package List 1 x Double Triangle Ruler