{"product_id":"drill-america-9-32-in-cobalt-heavy-duty-drill-bit-pack-of-12-durable","title":"Drill America 9\/32 in Cobalt Heavy Duty Drill Bit Pack of 12 - Durable","description":"\u003cp\u003eIn this review the Drill America 9\/32 in Cobalt Heavy Duty Drill Bit pack of 12 is assessed for tradespeople and serious DIYers who need bits that hold up when cutting hard metals. The bottom line: these jobber length cobalt bits are worth the purchase if you frequently drill stainless steel, inconel, or other high tensile alloys because the added cobalt and higher red hardness allow faster cutting and longer life than typical HSS bits. The review focuses on real-world durability, cutting performance, and overall value for metalworking tasks.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCobalt steel construction:\u003c\/strong\u003e The increased cobalt content raises red hardness so the bits stay sharp longer when drilling tough, high tensile materials like stainless steel and titanium.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold oxide surface treatment:\u003c\/strong\u003e A thin oxide finish identifies the tool and provides corrosion resistance without changing cutting performance compared with uncoated bits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJobber length:\u003c\/strong\u003e Provides a balance of reach and rigidity suited to general metalworking and professional shop use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound shank:\u003c\/strong\u003e Fits a wide range of chucks and toolholding systems for easy swapping between hand drills and drill presses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiral flutes, right-hand cut:\u003c\/strong\u003e Evacuate chips up and out of the hole when run normally, reducing clogging and improving hole quality in deep or heavy cuts.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThese bits are aimed at machinists, fabricators, metalworkers, and serious DIYers who frequently drill hard alloys such as PH stainless steel, inconel, and titanium or who need longer tool life than standard high-speed steel provides. The pack of 12 suits shops that consume bits regularly and prefer consistent, jobber length geometry.\u003c\/p\u003e\u003cp\u003eThose who only drill wood, soft metals, or occasional household tasks may not need cobalt-grade tooling and can save by choosing standard HSS bits; also, if you require specialized coatings for extreme abrasive applications, a different coated or carbide option may be a better fit.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExcellent durability and edge retention in hard metals thanks to the cobalt alloy.\u003c\/li\u003e\n\u003cli\u003eGood value for a 12-pack, with customers noting long life compared with some name-brand cobalt bits.\u003c\/li\u003e\n\u003cli\u003eRound shanks and jobber length make them versatile across drills and presses.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eThe thin gold oxide finish is mainly identification and corrosion resistance but does not provide the heat-barrier or wear reduction of thicker modern coatings.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e9\/32 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCobalt steel (heat resistant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength style\u003c\/td\u003e\n\u003ctd\u003eJobber length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShank type\u003c\/td\u003e\n\u003ctd\u003eRound shank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface treatment\u003c\/td\u003e\n\u003ctd\u003eGold oxide thin finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eD\/ACO Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturing standard\u003c\/td\u003e\n\u003ctd\u003eNational Aerospace standard 907\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Drill America 9\/32 in cobalt jobber bits are a practical, cost-effective choice for professionals and advanced hobbyists who drill hard alloys and need bits that last. They deliver stronger red hardness and noticeably longer life than standard HSS, making the 12-pack a sensible buy for frequent metalworkers who value durability and consistent performance.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAre these bits suitable for stainless steel?\u003c\/strong\u003e\u003cbr\u003eYes, the cobalt construction is specifically effective for drilling stainless steel and other high tensile alloys.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the gold oxide coating improve cutting speeds?\u003c\/strong\u003e\u003cbr\u003eThe thin gold oxide is mostly identification and corrosion resistance; speed gains come from the cobalt alloy and higher red hardness rather than the coating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo they fit common drill chucks?\u003c\/strong\u003e\u003cbr\u003eYes, the round shank is compatible with a wide variety of chucks and toolholding systems.\u003c\/p\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":48178411208923,"sku":"B00FX6YRKU","price":63.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71bfcGlQTwL._SL1500_f3baf104-bbea-4e73-816e-236a2ce024ce.jpg?v=1769684959","url":"https:\/\/gearmusthave.com\/products\/drill-america-9-32-in-cobalt-heavy-duty-drill-bit-pack-of-12-durable","provider":"GearMustHave","version":"1.0","type":"link"}