[5 Sizes for Your Various Needs] Therere 5 different diameters of auger drill bits, including 6mm, 8mm, 10mm, 12mm, 14mm. So you can choose the most suitable wood snake drill for the woodworking. [Hexagonal Shank Design] This design makes the hex shank wont slip during working, and the hex shank can be used with hand drills and bench drills. [Self-Directed Thread Head] The self-directed thread head of auger bits can help the drill bit be accurately and quickly positioned on the wood for easy drilling. [Central SolidWide Blade Auger Bit] The central solid design makes the drill bit stable and strong during the drilling, and the wide blade can provide faster drilling, easier chip removal and smoother hole walls. [High quality Helper for DIY] Made of high-carbon steel(65 ), these auger bits are rustproof and durable, and they can be used for processing all kinds of cork, hardwood and plastic materials.Theyre practical drilling tools for DIYer and woodworking lovers. SPECIFICATION color: as show Material: 65 carbon steel Length: 230mm Diameter: 6mm, 8mm, 10mm, 12mm, 14mm Suitable: hand drills and bench drills