{"product_id":"hertel-sdd43274547-cobalt-step-drill-bit-9-sizes","title":"Hertel SDD43274547 Cobalt Step Drill Bit 9 Sizes","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL SDD43274547 is a cobalt step drill bit designed for drilling multiple hole sizes in a single tool. It covers 9 hole sizes ranging from 4 mm to 20 mm in diameter, with a 5 mm step length between each size. The round shank with three flats measures 8 mm in diameter, providing a secure grip in standard chucks. The bright, uncoated finish is typical of cobalt high-speed steel tooling built for use in metal fabrication, HVAC sheet metal work, and general industrial drilling applications. Electricians, HVAC technicians, and metal fabricators regularly use step bits like this to punch clean, sized holes in thin to medium gauge sheet metal and conduit boxes.\u003c\/p\u003e\u003cp\u003eThis step drill bit is suited for sheet metal, electrical enclosures, conduit knockout work, and light structural steel. The 9-step geometry allows the user to drill a range of diameters without swapping bits, making it practical for field service and shop use alike. The cobalt construction provides improved heat resistance over standard high-speed steel, which is useful when drilling harder ferrous metals or working in high-duty-cycle environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt tool material for improved heat and wear resistance over standard HSS\u003c\/li\u003e\n\u003cli\u003e9 hole sizes in a single bit, from 4 mm minimum to 20 mm maximum diameter\u003c\/li\u003e\n\u003cli\u003e5 mm step length for controlled, incremental hole sizing\u003c\/li\u003e\n\u003cli\u003e8 mm round shank with 3 flats for secure chuck retention and anti-rotation\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish standard for cobalt step tooling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style step drill bit compatible with standard 3-flat or round chuck configurations accepting an 8 mm shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eStep drill bits of this type are installed and used by electricians, HVAC technicians, and metal fabricators working with sheet metal and thin steel panels. Secure the shank firmly in the drill chuck before use and confirm the workpiece is clamped or secured. Use appropriate cutting fluid when drilling harder ferrous metals to prolong tool life. Follow applicable shop safety and PPE requirements for rotary cutting tools.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Hole Sizes\u003c\/strong\u003e: 9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Hole Diameter\u003c\/strong\u003e: 4 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Hole Diameter\u003c\/strong\u003e: 20 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 8 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep Length\u003c\/strong\u003e: 5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Round with Flats\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flats\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.14 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: SDD43274547\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51751861518642,"sku":"SDD43274547","price":84.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0842150d414a14c51b2b0f1fe8616e1d.jpg?v=1788924483","url":"https:\/\/voomisupply.com\/products\/hertel-sdd43274547-cobalt-step-drill-bit-9-sizes","provider":"Voomi Supply","version":"1.0","type":"link"}