{"product_id":"cobalt-drill-bit-pack-of-12-jobber-length-for-tough-metals","title":"Cobalt Drill Bit Pack of 12 - Jobber Length for Tough Metals","description":"\u003cp\u003eIn this review the Drill America DWDCOEP12 E cobalt drill bit pack is evaluated as a practical option for tradespeople and machinists who need a reliable set of jobber length bits for tougher alloys. The single biggest reason to buy is the material: made of heat resistant cobalt with higher red hardness, these bits run up to 30 percent faster than standard high-speed steel on hard materials and hold up well when cutting stainless steel, high carbon steel, inconel and titanium. For anyone drilling demanding metals the set offers durable, sharp performance at a reasonable price.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCobalt steel construction:\u003c\/strong\u003e provides higher red hardness so the bits maintain cutting edge and allow increased speeds when machining high tensile materials.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold oxide surface treatment:\u003c\/strong\u003e a thin oxide layer aids identification without changing cutting performance compared to uncoated bits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound shank design:\u003c\/strong\u003e fits a wide variety of toolholding systems for easy use in hand drills and drill presses.\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 when drilling deep or through gummy alloys.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufactured to NAS 907:\u003c\/strong\u003e built to a national aerospace standard that signals consistent quality and repeatable geometry.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe DWDCOEP12 set is best suited to professional mechanics, fabrication shops, and serious hobbyists who frequently drill stainless steel, high carbon steel, nickel alloys or titanium and need bits that resist heat and stay sharp. Its jobber length makes it versatile for through-holes and general shop tasks while the cobalt composition supports extended runs and tougher applications.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include casual users who only drill soft materials or need specialty coatings for extreme wear resistance; for light occasional drilling a standard HSS set or coated bits optimized for masonry or wood may be more cost effective.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDurable cutting life thanks to heat resistant \u003cstrong\u003ecobalt steel\u003c\/strong\u003e construction.\u003c\/li\u003e\n\u003cli\u003eGood chip evacuation from the \u003cstrong\u003espiral fluted\u003c\/strong\u003e geometry, reducing clogging on deep cuts.\u003c\/li\u003e\n\u003cli\u003eWorks well across a range of hard materials and offers solid \u003cstrong\u003evalue for money\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eSome buyers report size discrepancies, so verify bit diameters against your needs before precision work.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\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\u003c\/td\u003e\n\u003ctd\u003eJobber length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface finish\u003c\/td\u003e\n\u003ctd\u003eGold oxide thin oxide treatment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShank\u003c\/td\u003e\n\u003ctd\u003eRound shank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlute type\u003c\/td\u003e\n\u003ctd\u003eRight-hand spiral flutes\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 DWDCOEP12 cobalt jobber set is a sensible buy for professionals and serious DIYers who drill hard metals regularly; it combines genuine heat resistance and sustained sharpness with practical fluting and shank design for broad compatibility. Given the performance on stainless and high carbon steels and the aircraft-grade standard, it represents good value for demanding shop work, with the caveat to check diameters if exact sizing is critical.\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 heat resistant cobalt construction and higher red hardness make them well suited to stainless steel and other hard alloys.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo the bits come coated for longer life?\u003c\/strong\u003e\u003cbr\u003eThey use a thin gold oxide surface treatment primarily for identification; performance is similar to uncoated cobalt bits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill they fit my drill?\u003c\/strong\u003e\u003cbr\u003eThe round shanks allow use in a wide variety of toolholding systems, including standard chucks and drill presses.\u003c\/p\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":48194007105755,"sku":"B00FXHG63U","price":32.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71bfcGlQTwL._SL1500_27504ac4-7925-4a2c-ab13-8d29fc6b968c.jpg?v=1770271049","url":"https:\/\/gearmusthave.com\/products\/cobalt-drill-bit-pack-of-12-jobber-length-for-tough-metals","provider":"GearMustHave","version":"1.0","type":"link"}