{"product_id":"cobalt-heavy-duty-jobber-drill-bit-pack-of-12-high-speed-performance","title":"Cobalt Heavy Duty Jobber Drill Bit Pack of 12 - High Speed Performance","description":"\u003cp\u003eIn this review the Drill America D\/ACO75P12 pack is judged as a workman-grade set of \u003cstrong\u003ecobalt jobber drill bits\u003c\/strong\u003e built for metalworkers who need reliable performance on hard alloys. The bottom line: these bits are for users who regularly drill stainless steel, nickel alloys or other high tensile materials and want bits that run hotter and last longer than typical HSS options. The set's cobalt construction and jobber length make it a practical choice for maintenance shops, fabrication work and serious DIYers who value durability and consistent hole quality.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCobalt steel construction:\u003c\/strong\u003e Delivers higher red hardness so the bits tolerate higher cutting speeds and hold an edge longer when working stainless steel and nickel alloys.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold oxide finish:\u003c\/strong\u003e Provides a thin surface treatment that resists light corrosion and helps visually identify the cobalt tools without changing cutting performance significantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound shanks:\u003c\/strong\u003e Fit a wide variety of chucks and toolholding systems for straightforward setup on handheld drills and drill presses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRight-hand spiral flute:\u003c\/strong\u003e Evacuates chips up and out of the hole to reduce clogging and help maintain cut quality in deeper holes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e118 degree standard point:\u003c\/strong\u003e Gives predictable centering and entry for general-purpose drilling across a range of metals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufactured to NAS 907:\u003c\/strong\u003e Produced to a recognized aerospace standard for consistent dimensions and quality.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThese bits are aimed at professional tradespeople, shop technicians and serious hobbyists who need a dependable \u003cstrong\u003ecobalt drill bit\u003c\/strong\u003e capable of cutting tough, heat-resistant alloys like PH stainless, Inconel and titanium. The pack format and jobber length suit repeat jobs where consistent bit life and predictable performance matter.\u003c\/p\u003e\n\u003cp\u003eUsers who only drill soft materials like wood or mild steel, or those who rarely drill metal, should consider less costly HSS or black oxide bits instead, since the cobalt grade is specifically beneficial when cutting harder metals and holding up under higher temperatures.\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\u003eLonger-lasting cutting edges on hard metals thanks to cobalt steel composition.\u003c\/li\u003e\n\u003cli\u003eGood value for a 12-piece pack compared with single-bit purchases, making replacements convenient.\u003c\/li\u003e\n\u003cli\u003eConsistent chip evacuation and cleaner holes due to the spiral flute design.\u003c\/li\u003e\n\u003cli\u003eManufactured to an aerospace standard for reliable dimensions and repeatable performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe gold oxide is mostly a cosmetic\/thin treatment and does not offer the same lubrication or wear resistance as thicker coatings.\u003c\/li\u003e\n\u003cli\u003eAngle feedback from users is mixed, so very specific point geometries may vary slightly from expectations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\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\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eCobalt steel (heat resistant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e12 bits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePoint angle\u003c\/td\u003e\n\u003ctd\u003e118 degrees standard point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShank style\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\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\/ACO75P12 pack is a strong choice for anyone who frequently drills hard metals and needs durable bits that tolerate higher speeds. Its \u003cstrong\u003ecobalt construction\u003c\/strong\u003e, consistent flute design and aerospace-level manufacturing make it good value for shop use where longer life and dependable holes matter.\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 steel construction is specifically effective for drilling stainless steel and other high tensile alloys.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo they work in handheld drills?\u003c\/strong\u003e\u003cbr\u003eYes. The round shanks allow use in a wide variety of chucks on handheld drills and drill presses.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the gold oxide a wear-reducing coating?\u003c\/strong\u003e\u003cbr\u003eThe gold oxide is a thin surface treatment mainly for identification and light corrosion resistance; it does not perform like thicker lubricating coatings.\u003c\/p\u003e","brand":"Drill America","offers":[{"title":"Default Title","offer_id":48237180027099,"sku":"B00FX6Y4O4","price":32.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71bfcGlQTwL._SL1500_64a471f1-71e6-45d6-8590-316f372f8399.jpg?v=1770750524","url":"https:\/\/gearmusthave.com\/products\/cobalt-heavy-duty-jobber-drill-bit-pack-of-12-high-speed-performance","provider":"GearMustHave","version":"1.0","type":"link"}