📐 Elevate Your Drafting Game! Effortlessly switch between 1:100, 1:200, 1:250, 1:300, 1:400, and 1:500. Enjoy crystal-clear markings that won't fade over time. Risk-free purchase with a full refund policy. Crafted from premium anodized aluminum for unmatched sturdiness. Ideal for architects, engineers, and students who demand accuracy. 30cm Length Durable Aluminum 6 Scales The Metal Scale Ruler is a premium 30cm triangular scale made from solid anodized aluminum, featuring six precise metric scales and laser-etched markings for clarity. Perfect for architects, engineers, and students, this ruler combines durability with professional-grade accuracy.