{"product_id":"hss-cobalt-twist-drill-bit-12mm-20mm-reduced-round-shank","title":"HSS Cobalt Twist Drill Bit 12mm–20mm Reduced Round Shank","description":"\n\u003ch2\u003eHSS Cobalt Twist Drill Bits – 12mm to 20mm Reduced Round Shank\u003c\/h2\u003e\n\u003cp\u003eTake on tough drilling tasks with confidence. These high-speed steel (HSS) cobalt twist drill bits feature a reduced round shank design, making them compatible with standard chucks while handling large-diameter drilling in metal, wood, plastic, and more. Whether you're a seasoned tradesperson or a dedicated DIY enthusiast, these durable multi-purpose bits deliver clean, accurate holes every time.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePremium HSS Material:\u003c\/strong\u003e Manufactured from high carbon steel \/ HSS for exceptional hardness, heat resistance, and long-lasting durability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReduced Round Shank:\u003c\/strong\u003e The reduced shank fits standard drill chucks, allowing you to drill large-diameter holes (12mm–20mm) without needing a specialised chuck.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpiral Flute Design:\u003c\/strong\u003e Efficiently evacuates chips and shavings for faster, cleaner drilling with less heat build-up.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Material Use:\u003c\/strong\u003e Suitable for metal, wood, plastic, and other common workshop materials.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Portable:\u003c\/strong\u003e At 156mm (6.14 in) overall length, these bits are easy to store and carry to any worksite.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Sizing:\u003c\/strong\u003e Available across the 12mm–20mm range for versatile project requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e High Carbon Steel \/ HSS Cobalt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type:\u003c\/strong\u003e Reduced Round Shank\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 156mm (6.14 in)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize Range:\u003c\/strong\u003e 12mm – 20mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGrit Type:\u003c\/strong\u003e Medium\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × HSS Cobalt Twist Drill Bit (size as selected)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Due to monitor calibration, colours may vary slightly from the images shown. Minor size tolerances due to manual measurement are normal.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/leather-hole-punch-tool-diy-stitching-punch-4-5-6mm\"\u003eLeather Hole Punch Tool | DIY Stitching Punch 4\/5\/6mm\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/uv-shaped-leather-groover-skiving-tool-kit-4-piece-diy\"\u003eU \u0026amp; V Leather Groover Skiving Tool Kit – 4-Piece Stainless Set\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-ceramic-trimming-tool-curved-skip-knife\"\u003eStainless Steel Ceramic Trimming Tool – Curved Skip Knife\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What materials can these HSS cobalt twist drill bits be used on?\u003c\/h4\u003e\n\u003cp\u003eA: These HSS cobalt twist drill bits are designed for drilling through a wide range of materials including metal, wood, plastic, and composite boards. The cobalt-enhanced high carbon steel construction makes them particularly effective on harder metals.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Will the reduced round shank fit my standard drill chuck?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The reduced round shank is specifically designed to fit standard drill chucks, so you can drill large-diameter holes (12mm–20mm) without requiring an oversized or specialist chuck. Always verify your chuck's maximum capacity before use.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the overall length of these drill bits?\u003c\/h4\u003e\n\u003cp\u003eA: Each drill bit measures 156mm (approximately 6.14 inches) in overall length, making them compact enough for most bench drills and hand-held power drills.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What materials can these HSS cobalt twist drill bits be used on?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These HSS cobalt twist drill bits are designed for drilling through a wide range of materials including metal, wood, plastic, and composite boards. The cobalt-enhanced high carbon steel construction makes them particularly effective on harder metals.\"}}, {\"@type\": \"Question\", \"name\": \"Will the reduced round shank fit my standard drill chuck?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. 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