Features: Experience durability with our 5pcs Drill Bit Set, crafted from carbon steel for long lasting performances in both hardwood and softwood applications. Featuring a tooth shaped design, these bits reduce friction and heat, ensuring extended lifespan and efficient drilling, complete with sizes ranging from 7.5cm-18cm. Ideal for professional woodworkers and enthusiasts alike, this set offers versatility and reliability for anyone working with wood materials. Perfect for woodworking projects at home or in the workshop, the set includes a storage case, extensions, a positioner, a drill adapter for comprehensive use. Achieve results with the self centering tip that ensures precise cuts without slipping, making it essential addition to your woodworking tool collection. Specifications: Component:Carbon Steel Size:7.5cm 10cm 12.5cm 18cm Package Includes: 5Pcs Drill Bit note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.