1、CORROSION RESISTANT MATERIAL: The 90 degree square ruler is made of excellent aluminum alloy with anodized red surface machined by numerical control, rust resistant, durable and corrosion resistant 2、ACCURATE SCALE: A scale engraved on the side of the central detector scale is accurate, durable and easy to read, useful for measuring square jobs 3、ACCURATE MARKING: With an L ruler, you can draw perfect horizontal lines while sliding the ruler along the working edge 4、REASONABLE AND PRACTICAL: Woodworking ruler has reasonable structure, easy to use. Adopt exquisite workmanship, lightweight and practical 5、APPLICABLE SCENARIO: Woodworking marking ruler is often used in woodwork and is also important when you make your own furniture. Dimension can be accurately measured, the proper right angles obtained, and fitted more tightly