★ Drill Bit Size --- Cutting edge diameter: 5/16 inch (7.938mm); shank diameter: 5/16 inch; cutting edge length: 80mm / 3.15 inch; overall length: 116mm / 4.57 inch, Included: 10 Pieces x Drill Bit
★PRACTICAL PERFORMANCE --- The twist drill offers excellent toughness, combining a titanium coating and a 135° angle design. It has significant advantages in processing performance and cost-effectiveness, achieving superior processing at low cost and striking a perfect balance between cost and quality.
★ Wide Applications --- For acrylic, plastic, wood, soft metals (Cu, Al alloys), carbon steel, cast iron & thin stainless steel, suitable for vehicle maintenance like sheet metal, bolt holes, brackets, wire harness mounts. (not to be used on hardened steels, high-alloy steels, thick stainless steel, or other ultra-hard materials.)
★ 4341 High-Speed Steel (HSS) --- Offers high hardness, excellent wear resistance, and good toughness. It is a versatile drill bit suitable for machining medium- to low-hardness materials.
★ Useful Tips --- Ensure the drill bit is perpendicular to the workpiece surface—tilting can cause breakage or hole deviation. For beginners: Always verify proper speed and feed rates before formal workpiece machining.
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We do not currently offer free shipping. However, this may be added at some point. We apologize.
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For returns or exchanges, please contact us within 14 days of receiving the product, along with a receipt or screenshot of the purchase, and a photo of the product with the packaging or tag intact.
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