100% and high quality Feature: Made of high quality aluminum alloy material with an anodic oxidation process is durable and rust-resistant. L shape and beveled edges make it easy to grip and convenient to operate, which won't damage fragile cutting edges. It is designed to hold joints firmly and squarely at an exact 90 degrees, which is a perfect choice for wood welding, metal welding, and more. Designed fro precision layout and measurement work. High strength and hardness. Convenient to use. Durable in use. Specifications: Material: Aluminum Alloy Size: approx.305x180x35mm/12.01x7.09x1.38in Color: As pictures shown Quantity: 1 Pc Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Content: 1 x Aluminum Alloy Square Ruler (other accessories demo in the picture is not included.)