Heavy-duty Aviation aluminum, Compared with normal aluminum alloy, aviation aluminum is lighter, more flexible, and less prone to deformation. It can immediately spring back to a flat state even being bent Big degrees. Precise Measurements & Double-Sided Design: Measure with confidence using the ruler's clear and accurate markings on both sides, ranging from 1 to 12 inches. This double-sided design offers added convenience and eliminates the need for constant flipping. Smooth & Safe Design: Experience a smooth and safe crafting experience with KEARING French curve ruler's sleek curves and smooth edges. It glides effortlessly without scratching your hands or damaging fabrics. Ideal for Design & Sewing Projects: KEARING 12-inch French curve ruler is a perfect tool for creating defined curves in various sewing and design applications. Its compact size makes it easy to handle and maneuver, while its versatile curves allow for drawing a wide range of curves for necklines, armholes, pockets, and other garment details. Unleash Your Creativity: Perfect for pattern makers, graphic designers, tailors, students, and DIY enthusiasts, this KEARING versatile French curve ruler empowers you to bring your creative ideas to life., Manufacturer: KEARING