{"product_id":"drill-america-d-cobalt-drill-bit-pack-of-12-jobber-length-tough","title":"Drill America D Cobalt Drill Bit Pack of 12 - Jobber Length, Tough","description":"\u003cp\u003eIn this review of the Drill America D Cobalt Drill Bit pack of 12 the bottom line is simple: these are jobber-length, heat-resistant cobalt drills built for cutting tougher metals where ordinary HSS will struggle. They are aimed at metalworkers, fabricators, and serious hobbyists who need bits that stay sharp when drilling stainless, high carbon steel, or nickel alloys. The reviewer found them notably durable and able to run at higher speeds than standard high-speed steel, making them a practical choice when working through thicker or higher tensile materials.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eCobalt steel construction:\u003c\/strong\u003e Provides higher red hardness so the bits tolerate higher cutting temperatures and maintain edge retention when drilling hard metals.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eGold oxide finish:\u003c\/strong\u003e A thinner oxide surface treatment reduces visual wear without changing performance much, while making identification easier than bare bits.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eRound shank:\u003c\/strong\u003e Allows use in a wide variety of chucks and toolholding systems for straightforward setup and removal.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eRight-hand spiral flutes:\u003c\/strong\u003e Evacuate chips up and out of the hole to reduce clogging and help maintain drilling accuracy in deeper cuts.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eManufactured to aerospace standard:\u003c\/strong\u003e Built to National Aerospace standard 907 for consistent geometry and material properties across the pack.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThese drill bits suit machinists, metal fabricators, and home shop users who frequently drill stainless steel, high carbon steels, titanium or nickel alloys and need bits that can be run faster than conventional HSS. The set is useful for tasks such as through-holes in brackets, mounting holes in steel panels, and working with 16 and 18-gauge galvanized sheet where durability and sharpness matter.\u003c\/p\u003e\n\u003cp\u003eUsers who only drill soft materials like wood, plastic, or occasional mild steel and who prioritize coated finish for longer life in high-volume production may want a different specialty coating. Also, those who require tapered or non-jobber lengths should look at other specific bit families.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eExcellent durability and edge retention in hard metals compared with standard HSS bits.\u003c\/li\u003e\n \u003cli\u003eAllows higher cutting speeds - around 30 percent faster than HSS in many applications - so jobs complete quicker.\u003c\/li\u003e\n \u003cli\u003eRound shanks and standard jobber length make them versatile for common drill chucks and setups.\u003c\/li\u003e\n \u003cli\u003eCustomers report good value for money and sustained sharpness through tougher tasks like 16 and 18-gauge galvanized steel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eGeometry feedback is mixed among users, so a few may find the point or flute shape less than ideal for their specific technique.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eDrill America\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eDWDCO\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\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eGold oxide\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\u003eLength style\u003c\/td\u003e\n\u003ctd\u003eJobber length\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\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Drill America D cobalt jobber set is a practical, cost-effective choice for anyone who drills harder metals regularly and needs bits that keep their edge and run at elevated speeds. For metalworkers and serious DIYers it delivers strong durability and usable performance for the price, though those seeking specialized geometry or non-jobber lengths should consider other options.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these bits suitable for stainless steel?\u003c\/strong\u003e\u003cbr\u003eYes, the cobalt construction and higher red hardness make them effective for stainless and other high tensile alloys.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the gold oxide coating change drilling performance?\u003c\/strong\u003e\u003cbr\u003eThe gold oxide is mainly a thin surface treatment for identification; performance is similar to uncoated cobalt tools.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan they be used in standard drill chucks?\u003c\/strong\u003e\u003cbr\u003eYes, the round shanks are compatible with common drill chucks and many toolholding systems.\u003c\/p\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":48225401962715,"sku":"B00FXHG4IM","price":43.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71bfcGlQTwL._SL1500_4f08ca6a-869a-49b1-9770-44029196c8f0.jpg?v=1770756071","url":"https:\/\/gearmusthave.com\/products\/drill-america-d-cobalt-drill-bit-pack-of-12-jobber-length-tough","provider":"GearMustHave","version":"1.0","type":"link"}