Specifications:  Product Name: Tap Drill Bit Material: High Speed Steel / HSS6542;  Shank: 1/4" (6.35mm) hexagon shank;  Surface Treatment: Titanium Coated;  DIY Supplies: Metalworking;  Size: M3x0.5, M4x0.7, M5x0.8, M6x1, M8x1.25, M10x1.5;  Quantity: 6 Pcs x Tap Drill Bits.     Features:  1. High hardness, rustproof, solid and durable;  2. The advantage is opening, tapping, chamfering;  3. Self-centering point, do not need assistant center drilling or center punching;  4. Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc;  5. Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency;  6. HSS6542 (M2) is of higher hardness and more durable than the HSS4341, and is suitable for cutting the steel even the 2mm 304 steel;  7. Complete Hole Drilling, Tapping And Deburring/Countersinking In One Operation With Power Drill – Saves Labor, Time. Applicable to some types of carbon steel and ordinary steel, copper and aluminum alloy drilling hole.     Package Included:  6 Pcs x Hexagon Shank Tap Drill Bits