Features Premium Aluminum Alloy: Crafted from durable aluminum alloy, providing exceptional hardness and wear resistance for long-lasting performance. Precision Measurement: Standard scale and screw holes ensure 1mm accuracy, enabling precise and accurate drawings for woodworking and drafting projects. Removable Backplate: Equipped with installation tools, the detachable backplate offers added convenience and flexibility for various applications. Sleek CNC Finish: The glossy and burr-free surface, achieved through CNC finishing, resists rust and deformation, ensuring a smooth and reliable performance. Versatile Application: Ideal for layout and measurement in carpentry and artistic drawing, the T square ruler offers a reliable solution for professionals and hobbyists alike. Precision and Durability Craft with confidence using the yunyi T Square Ruler. Constructed from aluminum alloy, this ruler offers exceptional hardness and wear resistance. The CNC finished surface ensures a glossy and burr-free exterior, preventing rust and deformation, making it a reliable tool for long-term use. Package List 1 x T Square Ruler 1 x Right Angle Handle 4 x Screws 1 x Hex Wrench