7+1PCS Different Drill Bits Woodworking drill bits in sizes 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, including a hex wrench. The hex key can be used to loosen and tighten screws and adjust the cutter length. It is also useful for disassembling and installing drill bits.HSS Steel These wood drill bits are made of high-speed steel (HSS), providing high hardness, sharp cutting edges, and excellent wear and heat resistance. They deliver strong, clean, flat-bottomed holes with precision and can cut efficiently in any direction.Tricuspid Centering & Five-Edge Chamfer The three-point centering design ensures no offset and prevents slipping, allowing for accurate and fast drilling. The five-edge chamfered cutting edge helps remove wood chips and debris quickly, enabling smooth and efficient operation.Application Ideal for drilling holes in wood, plywood, plastic, and similar materials. Suitable for tasks such as installing drawer ball joints and other woodworking projects.Compatible with Power Tools Works with drill presses, hammer drills, bench drills, vertical drills, pillar drills, portable drills, and other standard drilling machines.