Description: This Aluminum Alloy Marking Ruler is a high - quality tool made from sturdy and corrosion - resistant aluminum alloy. It features two standard scales that are accurate and easy to read, making it suitable for precise measurements. Widely used by architects, engineers, carpenters, students, and other professionals, this multi - function measuring ruler also includes a hanging hole for convenient storage and has no compatible with sharp edges to prevent scratches. Specification: Material: Aluminium Alloy Color: Black Size: 900mm, 600mm, 300mm Type: Ruler Package Included: 1 × Ruler 1. HIGH QUALITY MATERIAL: Aluminum alloy material, corrosion resistant and sturdy. 2. EASY TO READ: Two standard scales, accurate and easy to read and measure. 3. WIDELY APPLICATION: It is widely used by architects, engineers, carpenters, students, cartographers and other professionals. 4. EASY TO STORE: Hanging hole design for easy storage. No compatible with sharp edge to prevent scratch. 5. POSITION LIMITATOR: Can be attached with T-shaped ruler position limitator, and both left and right ends can be installed.