[Package Includes] You will get a triangular architect scale designed to make drawing and measuring architectural drawings easier. Length: 30cm. Weight: 110g. Includes 6 commonly used scales: 1: 1001: 2001: 2501: 3001: 4001: 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 engraved technology effectively prevents scale numbers and marks from wearing or fading.[Material] The technical drawing ruler is made of aluminum alloy, precision manufacturing, durable corrosion-resistant and durable, not easy to break, beautiful and durable overall.[Wide application] A useful measuring tool for any project, sufficient for all construction and renovation projects, also for amateur architects, artists and DIY enthusiasts. Features: The aluminum triangle ruler is professional quality with supreme precision. With reliable construction and precise 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 labeled two ways to easily read right to left or left to right. Unlike other products, our metal ruler was created with your safety in mind. Our scale ruler has chamfered edges, so say goodbye to accidental dings, scratches and cuts! Specifications: Product name: ruler;architectural scale Color: black Size: 30cm Weight: 110g Material: alloy; aluminum scale: 1: 100, 1: 200, 1: 250, 1: 300, 1: 400, 1: 500 Package included: 1 * ruler; metal scale These items are real , but due to different lighting or displays, there will inevitably be a slight color difference, and the color of the product will depend on the actual situation.