This 41-piece HSS Sprint Master drill set is designed for precision and durability, ideal for drilling alloyed carbon and plain steel with ease. Sizes : Includes drills in sizes: 6, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9, 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9, and 10mm. High-Quality HSS : Offers toughness and precision with excellent cutting efficiency. Special Point Shape : Designed for increased speed and reduced drilling time. Long-Lasting : High elasticity and toughness provide long-term durability. Break-Resistant : Enhanced resilience and high-quality HSS steel ensure reliable performance. Brand : Alpen