6 Pieces Architectural Scale Ruler, Engineering Scale and 12 Inch Metal Ruler Set, 12 Inch Triangular Engineering Scale Rulers, Laser-Etched Aluminum Drafting Tool for Blueprints

Good material: The scale ruler set is made from pure aluminum mixed with other elements to create a high-strength alloy. Laser-etched markings: The scale ruler is precisely marked, making your drafts, designs, blueprint more accurate. Durable and sturdy: Designed for maximum durability, this 3 sided metal architect ruler is suitable for lasting use. Wide uses: The architectural scale ruler is suitable for architects, engineers, draftsmen, builders, roofers, teachers and students, etc. Specifications: Size: Triangular scale engineer ruler: 12 inch/ 30 cm, 30/ 60 degree triangular ruler, 45/ 90 degree triangular ruler, a protractor and a 15 cm ruler Color: silver Material: metal, anodized aluminum alloy Package contents: 2 x Triangular architect scale rulers 2 x Triangular rulers 1 x 15 cm Ruler 1 x Protractor