Enhance your woodworking projects with this high-quality Hinge Drill Bit set, crafted from durable aluminum alloy and iron for exceptional strength and wear resistance. Designed specifically for drilling precise hinge holes in doors and windows, this tool ensures high positioning accuracy, preventing any shifting during operation for effortless and accurate drilling every time. Key Features: · Premium Aluminum Alloy and Iron Construction: Provides robust durability and wear resistance, ensuring long-lasting performance even with frequent use. · High Positioning Accuracy: Guarantees stable drilling without shifting, making the process smooth and precise for professional results. · Efficient Chip Discharge Design: Features holes on both sides of the drill bit top to automatically expel wood chips, preventing drill bit jams and maintaining clean, efficient drilling. · Versatile Use for Woodworking: Ideal for drilling door and window hinge holes, this hinge hole puncher comes with drill bits in multiple sizes to suit various tapping screws and wood hardness levels. · Multiple Drill Bit Sizes Included:  - 5/64in (≈2mm hole diameter) for 2.2-2.8mm tapping screws  - 7/64in (≈2.8mm hole diameter) for 3-3.5mm tapping screws  - 9/64in (≈3.5mm hole diameter) for 4-4.5mm tapping screws (x2)  - 11/64in (≈4.5mm hole diameter) for 5-5.5mm tapping screws  - 13/64in (≈5.1mm hole diameter) for 5.6-6.1mm tapping screws  - 1/4in (≈6.3mm hole diameter) for 6.8-7.3mm tapping screws · Adjustable for Wood Hardness: Select the appropriate drill bit size based on wood hardness—smaller sizes for softer wood and larger sizes for harder wood—to achieve optimal hole punching and screw fitting. Specifications: · Material: Aluminum Alloy and Iron · Item Type: Hinge Drill Bit · Sizes: 5/64in, 7/64in, 9/64in (x2), 11/64in, 13/64in, 1/4in Package Includes: · Complete set of Hinge Drill Bits in specified sizes This Hinge Drill Bit set combines precision, durability, and ease of use, making it an essential tool for woodworking professionals and DIY enthusiasts alike. Achieve clean, accurate hinge holes with minimal effort and maximum efficiency every time.