4/7 Pcs HSS Core Drill Bit Set Hole Puncher Hinge Tapper for Doors Self Centering Woodworking Power Tools 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: Model62A449S67F42062 Color: Silver Material: Brass + High-speed Steel Appearance: Electroplating Type: Core Drill Bit Quantity:4 pcs Drill x Hole Diameter x Suitable Self-tapping Screw Size 5/64" x 2mm x 2.2-2.8mm 7/64" x 2.8mm x 3-3.5mm 9/64" x 3.5mm x 4-4.5mm 11/64" x 4.5mm x 5-5.5mm Quantity: 7pcs Size: 5/64", 7/64", 9/64", 11/64", 13/64", 5mm, 1/4" Drill x Hole Diameter x Suitable Self-tapping Screw Size 5/64" x 2mm x 2.2-2.8mm 7/64" x 2.8mm x 3-3.5mm 9/64" x 3.5mm x 4-4.5mm 11/64" x 4.5mm x 5-5.5mm 5mm x 5mm x 5.5-6mm 13/64" x 5.2mm x 6-6.5mm 1/4" x 6.35mm x 7-7.5mm Package Size: Approx. 12.5 * 7.5 * 3cm / 4.92 * 2.95 * 1.2in Package Weight: 218g / 7.69oz