
Core Drill Bit Set Hole Puncher
It's a professional drilling tools set, applicable to the installation of door hinge.Features: Brass and high-speed steel material, durable and excellent for use. Drill bush for precise positioning, will not shift. Sawdust will be automatically discharged from the top of the drill holes on both sides, not stuck drill. Unique design and perfect punch effect. Applicable to the installation of door hinge. Good tools for carpentry DIY or professional engineers.Usage Instruction: Please adjust according to hardness of the wood, if the wood is soft, choose a smaller size; if the wood is hard , you can choose a larger size or corresponding opening tool.Specifications: Color: Silver Material: Brass + High-speed Steel Appearance: Electroplating Type: Core Drill BitQuantity:4 pcs Drill Hole Diameter Suitable Self-tapping Screw Size 5/64" 2mm 2.2-2.8mm 7/64" 2.8mm 3-3.5mm 9/64" 3.5mm 4-4.5mm 11/64" 4.5mm 5-5.5mm Quantity: 7pcs Size: 5/64", 7/64", 9/64", 11/64", 13/64", 5mm,