Features: The woodworking Drill Bit Set features 15-35mm carbide tipped cutter with self centering spurs, delivering extended durability and precise flat bottom hole in hardwoods and softwoods for professional woodworking. Each set includes essential accessories like extension rods, hex key, and adapter, while the tooth grinding design minimizes friction and heat buildup during prolonged drilling operations. Ideal for carpenters, furniture makers, and DIY enthusiasts requiring reliable hole cutting solution for cabinetry, joinery, or custom woodcraft projects. Perfect for creating clean mortises in wood table, installing concealed hinges on kitchen cabinets, or crafting decorative wood wall panels with multiple bore size. The included storage case organizes all drill bits and accessories compactly, ensuring tool protection and portability for workshop use or on site installations. Specifications: Component:Steel Box Size:Approx.20x15x5.0cm/7.87x5.9x1.96inch 2Option Type; Package Includes: Package A 5pcs Drill Bit 1pc Long Extension, 1pc Short Extension, 1pc Positioner, 1pc Drill Adapter 1pc Wrench, 1pc Box Package B 7pcs Drill Bit 1pc Long Extension, 1pc Short Extension, 1pc Positioner, 1pc Drill Adapter 1pc Wrench, 1pc Box note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.