Aluminum Alloy Anti-slip Laser Calibration Student Ruler Cutting Protection Drawing Tool School Office Supplies Woodworking Straight Tailoring Ruler Architect EngineerFeature:1. No Scratches: The protective plate has a 12.5mm/0.49 inch high baffle to prevent hand scratches.2. Material: Aluminum alloy ruler is oxidized, durable, lightweight design, suitable for office and home use.3. Clear scale: the scale is laser calibrated, not easy to fade, clear and easy to read.4. Anti-seepage design: it can avoid the marking of the structure when the ink penetrates due to the phenomenon of ink dragging.5. Anti-slip: Thick anti-slip strip ensures the stability of cutting and marking.6. Easy to Store: With hanging holes, it can be hung on the wall for easy storage. Specification: Material: Aluminum Alloy Surface Treatment: Oxidation Size (Optional): 20cm/7.87 inch, 30cm/11.81 inch, 45cm/17.72 inchScope of application: suitable for architects, engineers, carpenters and other students and professionals in technical drawing projects. Note:Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-3cm measurement deviation due to manual measurement.1 X Protective Ruler