About this item. High Quality Material - Made of high carbon steel (65 ), These drill bits are rust resistant and durable. They can be used to process all kinds of cork materials, hardwoods and plastics. These are handy drilling tools for DIY and woodworking enthusiasts. 6 Sizes for Your Various Needs - There are 6 different diameters of auger drill bits including 6mm, 8mm, 10mm, 12mm, 14mm, 16mm. You can choose the appropriate drill according to your needs while working. Hex Shank Design - This design prevents the hex shank from slipping while working, and the hex shank can be used with hand drills and drill presses. Self-Directed Wire Head - The self-guiding wire head of auger bits can help the drill bit be exactly quickly placed on wood for easy drilling. The solid center design makes the drill bit stable and tough while drilling, and the wide blade can provide faster drilling, smooth hole wall after drilling and smooth chip removal. View more details.