[5 Sizes for Your Different Needs] There are 5 different diameters of drill screws, including 6mm, 8mm, 10mm, 12mm, 14mm. So you can choose the most suitable wood auger screw for woodworking. [Hexagonal Shank Design] This design ensures that the hexagonal shank does not slip during work, and the hexagonal shank can be used with hand drills and pillar drills. [Self-Guiding Threaded Head] The self-guiding threaded head of drill screws can help the drill to be precisely and quickly positioned on the wood for easy drilling. [Central Solid Wide Blade Auger Bit] The central solid design makes the drill stable and strong during drilling, and the wide blade can provide faster drilling, easier chip removal, and smoother hole walls. [High-Quality Helper for DIY] Made of carbon steel (65#), these drill screws are rust-proof and durable, and they can be used for processing all types of cork, hardwood, and plastic materials. They are practical drilling tools for DIY enthusiasts and woodworking lovers. SPECIFICATION color: as shown Material: 65# carbon steel Length: 230mm Diameter: 6mm, 8mm, 10mm, 12mm, 14mm Suitable: hand drills and pillar drills