Specifications Product Name: Triangular ruler marking device with angle positioning Size: 12 × 8 × 9 cm ≈ 4.72 × 3.15 × 3.54 inches Description: 1. High quality materials: This woodworking square protractor is made of high-quality aluminum metal, with a sturdy structure that prevents deformation and ensures long-term accuracy. It has an oxidized , high hardness, light weight, and rust resistance. 2. Multi angle measurement: Our multi angle measuring ruler is designed with positioning pins for precise measurement and angle marking, making it perfect for DIY enthusiasts, decorators, and engineers. 3. High precision scale: This triangular ruler marking device has clear imperial scale, with a minimum measurement unit of 1 millimeter and minimal error, allowing for fast and accurate measurement. The speed block is easy to assemble and disassemble, 4. Multi functional drilling: Multi angle measuring ruler, compatible with various standard screw sizes, allowing you to easily find matching holes and quickly complete drilling tasks. In addition, it is detachable, easy to carry without any burden. 5. Wide application: A detachable aluminum alloy oblique triangle ruler set, used for various measurement tasks, with functions such as measurement, calibration, and marking. Not only is it an ideal choice for carpenters and builders, but it is also a perfect choice for DIY enthusiasts, decorators, and engineers. Product List: 1 * Triangular ruler marking device