[Package Includes] You will receive a triangular architect scale designed to make drawing and measuring architectural drawings easier. Length: 30cm. Weight: 110g. Includes 6 commonly used scales: 1:100, 1:200, 1:250, 1:300, 1:400, 1:500. Six rulers in one. [Laser Engraving Technology] All numbers and measurement marks on the drawing scale rulers are laser engraved for maximum clarity and readability. Laser engraving effectively prevents scale numbers and marks from wearing or fading. [Material] The technical drawing ruler is made of aluminum alloy, precision manufactured for durability, corrosion resistance, and strength. It is not easily broken and offers a sleek, long-lasting design. [Wide Application] A useful measuring tool for any project, suitable for construction and renovation tasks, as well as ideal for amateur architects, artists, and DIY enthusiasts. Features: The aluminum triangle ruler offers professional quality with high precision. With reliable construction and accurate performance, the black construction ruler is ideal for architects, engineers, draftsmen, and students. No need to waste time figuring out how to measure each increment. Scales are labeled in both directions for easy reading from left to right or right to left. Unlike other products, our metal ruler was designed with safety in mind. The scale ruler features chamfered edges, reducing the risk of accidental dings, scratches, and cuts. Specifications: Product Name: Ruler; Architectural Scale Color: Black Size: 30cm Weight: 110g Material: Aluminum Alloy Scales: 1:100, 1:200, 1:250, 1:300, 1:400, 1:500 Package Included: 1 x Ruler; Metal Scale Note: These items are real. Due to different lighting conditions or display settings, there may be slight color variations. The actual product color may vary slightly from images shown.