Features 1、Versatile Tap Bit Set -- 7-pack different metric thread sizes tap bits (M3x0.5, M4x0.7, M5x0.8, M6x1 M8x1.25, M10x1.5, M12x1.75). 2、High Performance -- Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency. 3、Wide Application -- Full tap bit set ideal for drilling, tapping, cutting on wood, soft metal, aluminum plate, iron, etc. (Note: it can not work well with stainless steel 304 or high hardness metal.) 4、Premium Quality -- Made of high speed steel(HSS), high hardness, rustproof, solid and High quality. 5、Quick Change -- 1/4 inch hex shank fits into power tools more easily and securely. Specification Features: Versatile Tap Bit Set -- 7-pack different metric thread sizes tap bits (M3x0.5, M4x0.7, M5x0.8, M6x1 M8x1.25, M10x1.5, M12x1.75). High Performance -- Drilling and tapping in one, one-step processing, greatly save processing steps and time costs, improve working efficiency. Wide Application -- Full tap bit set ideal for drilling, tapping, cutting on wood, soft metal, aluminum plate, iron, etc. (Note: it can not work well with stainless steel 304 or high hardness metal.) Premium Quality -- Made of high speed steel(HSS), high hardness, rustproof, solid and High quality. -- 1/4 inch hex shank fits into power tools more easily and securely. Specification: Color: Sliver Material: High-speed steel Shank Diameter: 1/4in(6.35mm) Quantity: 7pcs Type: Tap Drill Bit Size: M3x0.5: Total length: 67mm, Spiral length: 22mm, drill diameter: 0.5mm M4x0.7: Total length: 67mm, Spiral length: 22mm, drill diameter: 0.7mm M5x0.8: Total length: 69mm, Spiral length: 25mm, drill diameter: 0.8mm M6x1.0: Total length: 68mm, Spiral length: 25mm, drill diameter: 1.0mm M8x1.25: Total length: 71mm, Spiral length: 38mm, drill diameter: 1.25mm M10x1.5: Total length: 72mm, Spiral length: 38mm, drill diameter: 1.5mm M12x1.75: Total length: 81mm, Spiral length: 46mm, drill diameter: 1.75mm Application: Suitable for soft metal, aluminum, iron, steel board and 2mm or less stainless steel Packing List: 7 * Hex Shank Tap Drill Bit Package List 7 * Hex Shank Tap Drill Bit