This Camlin Hi-Par 0.5 mm HB Lead Pack includes 10 tubes of high-polymer, break-resistant leads designed for smooth and precise writing. Ideal for mechanical pencils, each tube contains strong, consistent leads that deliver clean lines suitable for notes, drafting, exams, diagrams, and everyday writing. The HB grade provides the perfect balance between dark marking and durability, making it a dependable choice for students, offices and professionals who require reliable pencil performance throughout the day.