• Includes 9 pieces: compasses, mechanical pencils, refills, extenders, and more, all in a convenient plastic case. • Made with high-quality aluminum alloy, resistant to deformation and rust. • Ergonomic design with excellent grip and spring chuck for easy circle drawing. • Provides stability when drawing, preventing unnecessary compass movements. • Ideal for students, teachers, engineers, and artists in mathematics, geometry, art, and design. • Product dimensions: 22 cm long, 10 cm wide, and 2 cm high.