This professional DEWALT Extreme Flatwood 9 piece set is ideal for rapid and continuous drilling into any type of wood. Heat absorbtion shafts ensure that they remain sharp for longer. The extra thick robust steel shank delivers outstanding durability and bit life. A precision ground central point offers faster material penetration and increased speed. Size of the bits: 12, 14, 16, 18, 20, 22, 25, 28, 32 mm. Compatible with the TSTAK system via the Large Tough Case, to hold all your accessory sets in one place.