Universal Holder Compass works with any standard sized pencil or pen, and is compatible with rulers, triangles, and protractors. Graduations along the edge provide easy measurement identification. The compass is metal and the geometric tools are high-quality plastic, giving strength and long-lasting use. 7-piece geometry kit includes: - 1 metal study compass - 2 triangles (45° and 30°/60°) - 1 ruler - 1 protractor - 0.7 mm pencil lead refill - pencil sharpener - eraser Includes an iron case to protect the tools and keep them organized in a backpack or on a desk. Easy to carry and store. Use scenarios: - In geometry class: draw circles, arcs, and accurate angles with the compass and protractor. - In technical drawing or crafts: lay out precise circles, measurements, and lines using the ruler and triangles. - For homework or exams: compact kit provides all essentials in one portable set.