Integrated scale display for precise measurement. The built-in scale enables quick, accurate measurement and enhances drafting precision. It serves as a large compass for math constructions and can be used as a writing/marking tool. Easy to use for all skill levels. Simple, ergonomic design makes it intuitive for both professionals and students, supporting geometry teaching and classroom activities. Versatile functionality. Multifunctional tool for drawing, measuring, and creating arcs. Compatible with most standard drawing compasses and mathematics accessories to streamline layout work. Multifunctional use for woodworking and education. Suitable for use with woodworking compass pens and geometry teaching tools, expanding options for design, carpentry, and school projects. Typical applications - In geometry classrooms to construct precise circles, arcs, and angle marks. - In drafting or basic design projects to layout accurate circles and measurement lines. - In woodworking or carpentry to lay out arcs and circles on wood and mark reference lines.