HSS twist drills combine toughness and precision with excellent cutting efficiency for drilling alloyed carbon and plain steel. Ideal for hand held operations. The ALPEN Sprint Master will show you new dimensions of speed and reliability. It reduces drilling time by around a third thanks to optimized drill geometry and the special ALPEN tip shape. And still delivers the customary top-quality result. Satisfaction is guaranteed further still by a longer service life that has been increased by a factor of 3 through the use of high-quality HSS steel and a special heat treatment process. The speed and long-term efficiency of a champion are words that best sum up the ALPEN Sprint Master. 25 Piece HSS Sprint Master Drill Set Sizes : 1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13mm HSS Twist Drills tough and precise for drilling alloyed carbon and plain steel Break resistant with high elasticity and toughness Lon