Qiedie - 6pcs Tap Drill Set, Multifunctional 1/4 Hex Shank Metric Hand Thread Taper Bit Deburr Countersink M3-M10 for Wood Plastic Aluminum Copper

Material: Our tap drill bit set is made of high speed steel (HSS), with high hardness, no rust and can be used for a long time Elegant Appearance: Our tap drill bit set is coated with nano blue on the surface, which is more fashionable and dazzling than other ordinary tap drill bits, more pleasing to the eye and keep you in a good mood Perfect Design: The holes of our countersink drill bit set are neat, smooth, without hems and do not cause shaking. Easy positioning can increase drilling speed. Step-by-step processing improves work efficiency and greatly reduces processing steps and time costs. During drilling, the spiral groove design is conducive to waste dissipation. Size: With 6 different size taps, M3 (3mm), M4 (4mm), M5 (5mm), M6 (6mm), M8 (8mm), M10 (10mm), hand diameter 6.2mm, can be used for different tapping threads Wide Use: Our tapping drill bit set is suitable for drilling and cutting soft metals, aluminum panels, iron, wood, plastics, etc. The material thickness is