This high-precision triangle ruler set is designed for professional drafting and architectural engineering. Crafted from durable, high-transparency organic material, it ensures long-lasting use without breakage. The set includes a multifunctional protractor with clear, wear-resistant markings for accurate measurements. Its unique curve template function allows for versatile design applications, while the standard 90-degree angle and vertical scale lines provide precision in every detail. Ideal for both educational and professional settings, this tool offers exceptional clarity with a 98% light transmittance rate, making it perfect for detailed drawings and designs. Whether you're a student or a professional, this comprehensive ruler set will elevate your drafting experience with its robust construction and meticulous design.