The Planet Try Square is a precision measuring and marking tool used in woodworking and other precision tasks. It is made from high-quality materials, including rosewood, spring steel, and double brass facings. The use of these materials ensures durability and longevity, making the Planet Try Square a reliable tool for repeated use over time. The blade of the Try Square is securely held in place by three brass rivets, ensuring accurate measurements and reliable performance. The Try Square is available in two sizes, making it versatile and suitable for a range of tasks, from small-scale projects to larger woodworking applications. One of the key features of the Planet Try Square is its ability to be used as both an external and internal square, making it a versatile and valuable addition to any woodworker's toolkit. Whether you need to measure and mark right angles on the edge of a board or on its face, the Planet Try Square is up to the task. Overall, the Planet Try Square is a high-quality tool that is both durable and accurate, making it an essential tool for any woodworking project that requires precision measurements and marking. 300mm: TS300