CENTERING GEOMETRY - Highly accurate drilling is easy with Bosch Centering Geometry. Engineered throughout for a perfect finish, it offers a slip-free start and stabilised action. CENTERING TIP - Start holes accurately with a specially-designed centering tip. This helps you be precise in your drilling every time, working efficiently for hundreds of clean holes. FINE GRINDING - DRILL - High-performance carbide tip manufactured by fine grinding. We can grind razor-sharp edges in the hardest metal: This enables complex, highly efficient designs. DUST EXTRACTION CHANNEL - Optimised dust extraction channel for fast drilling. The tip and fluting work together to facilitate chip removal, ensuring an efficient drilling process. Features For drilling in all kinds of materials. Centring tip.