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Saiper Combination Drill and Tap Bit Set (M3-M10) HSS 1/4" Hex Shank Tap Drill Bit for Wood, Plastic, Aluminum, 6pcs/set[Specification]Type: Combination drill and tap bit setMaterial: High speed steel 4341System: MetricSize: M3 x 0.5, M4 x 0.7, M5 x 0.8, M6 x 1, M8 x 1.25, M10 x 1.5Shank: 1/4'' (6.35mm) hex shankWeight: 0.19lb / 84g [Features]1. Metric sizes engraved on the bits to meet your different needs2. High durability and hardness3. Anti-wear: The back of the cone over the faucet to prevent excessive drilling caused by thread damage4. Drilling and tapping at the same time, save you time and effort! 5. Suitable for drilling, tapping, cutting on wood, plastic, soft metal (eg aluminum plate, iron), Not for hard materials (eg steel sheet) [Need to Pay Attention]* This drill and tap bit set NOT for Hard Metal/Iron Casting** Excessive sloshing and tilting will affect tapping and even break the tap*** The composite tap is preferably operated on a bench drill or a tapping machine. The thickness of the workpiece is less than 5 mm**** If the hand drill is used, the thickness needs to be within 2 mm, otherwise the tap is easy to break (because the hand The drill cannot always be operated vertically and at a constant speed) [Package Contains]6* Combination Drill and Tap Bit Set (M3-M10)【Customer Service】Our commitment to you is to answer your e-mail within 12 hrs, weekend within 24 hrs. Send us an email with any questions or concerns you may have!100% Money Back GUARANTEE- We stand by our products and if you receive a defective product, please take a photo and contact us by Email! We will send you a new item or full refund without hesitation!