This professional-grade navigation and drafting tool set combines precision with versatility. The 8-inch triangular ruler features durable brass and stainless steel construction, delivering exceptional accuracy for maritime navigation and technical drawing applications. The set includes a brass divider with precise stainless steel points, making it perfect for detailed measurement work. The ruler maintains consistent alignment through carefully engineered pivot points, while clear measurement markings ensure accurate readings. A protective navy blue cover keeps your instruments secure during transport and storage. The ruler's balanced weight distribution and smooth operation provide superior control during detailed work, making it an essential tool for navigators, architects, and technical drawing professionals. The robust metal components ensure reliable performance across various surfaces, from nautical charts to drafting paper. This comprehensive set combines functionality with durability, suitable for both maritime navigation and precision drafting tasks. The included protective housing ensures all components remain in pristine condition, ready for your next measurement project.