- Portable measuring ruler: Accurate and clear scale provides high precision for drawing and painting tasks. Easy to use for quick measurements and layout work, featuring a swing arm angle protractor for convenient angle transfer. - Professional protractor: Smooth surface with no burrs for safe and comfortable handling. Gentle on the skin and suitable for office measuring tasks, reducing the risk of snags or irritation. - Geometry protractor: Versatile tool for architecture, professional applications, civil engineering, painting, drafting, technical illustration, and measurement. Includes a geometry circle protractor for circular measurements and arcs. - Circle geometric ruler: Circle protractor scales are designed to resist fading and stay clear after repeated use, making it a durable drafting tool for long-term projects. Use scenarios - Architecture and drafting: Use the protractor and circle ruler to lay out precise angles and arcs in floor plans, elevations, and detailed drawings, improving accuracy and consistency across blueprints. - Civil engineering and site planning: Employ the tool for technical illustrations, structural measurements, and circular geometry tasks required in plan development and review. - Art, design, and education: Apply the swing arm angle protractor and circle scales for accurate angle transfer, geometric drawing, and teaching geometry concepts in classrooms or studios.