General description 500mm Metal Ruler Square is a high-quality measuring tool designed for DIY projects, handmade leatherwork, and sewing. Its L-shaped design and double angle feature make it ideal for precise measurements in various applications. Technical specifications Size: 500 * 250 mm Material: Hardened stainless steel Double-sided reading scale Embossed graduations Scratch-resistant protective finish Usage Ideal for rafters, window framing, doors, stair layouts, and other applications.