{"product_id":"115pcs-cobalt-drill-bits-set-1-16ft-1-2ft-durable-high-speed-steel","title":"115Pcs Cobalt Drill Bits Set 1\/16ft-1\/2ft - Durable High Speed Steel","description":"\u003cp\u003eOur review of this 115-piece cobalt drill bit set finds it best suited for hobbyists and tradespeople who need a wide range of sizes and reliable cutting on hard materials. The set's single biggest selling point is the combination of high-speed steel with a black and gold oxide finish and a 135 degree split point, which together deliver fast, centered starts and improved corrosion resistance. In testing and user reports, the bits cut through stainless steel, cast iron, wood and hard plastics with good sharpness retention, and the included metal indexed storage case keeps the kit organized for repeated jobsite use.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e115-piece size range:\u003c\/strong\u003e Includes sizes from 1\/16' to 1\/2' so the user has common hole diameters for metal, wood and plastic without buying extras.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-speed steel with oxide finish:\u003c\/strong\u003e The black and gold oxide coating increases corrosion resistance and helps the bits retain edge life during extended projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e135 degree split point:\u003c\/strong\u003e The sharpened, fully ground tip self-centers and penetrates quickly, reducing walking and the need for pilot holes on many materials.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJobber length twist design:\u003c\/strong\u003e The spiral flute geometry reliably carries chips out of the hole to reduce friction and maintain cutting performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound straight shank:\u003c\/strong\u003e Simple shanks fit standard chucks and the consistent shank form helps with alignment and grip in drill chucks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal indexed storage case:\u003c\/strong\u003e A durable case with labeled slots keeps the bits arranged and protected for storage and transport.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis set is a good fit for DIYers, automotive hobbyists, and metalworkers who want a full selection of jobber-length bits capable of drilling into stainless steel, cast iron, alloy, wood and hard plastics. The range of sizes and the tougher HSS material make it useful for both home workshops and portable tool kits.\u003c\/p\u003e\u003cp\u003eThose who frequently perform heavy industrial drilling or need carbide grades for very abrasive or hardened steels should look elsewhere; some users report breakage when forcing bits through the hardest stainless grades, so professionals drilling heat-treated steels at high feed rates may prefer dedicated cobalt or carbide specialty bits.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eWide size range from 1\/16' to 1\/2' covers most common drilling tasks.\u003c\/li\u003e\n\u003cli\u003eSharp 135 degree split point provides fast, centered starts with less walking.\u003c\/li\u003e\n\u003cli\u003eBlack and gold oxide finish improves corrosion resistance and wear life compared with plain HSS.\u003c\/li\u003e\n\u003cli\u003eMetal indexed case keeps bits organized and protected on the jobsite.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome users report durability issues when pushing hard through the toughest stainless steels, so they can break under extreme loads.\u003c\/li\u003e\n\u003cli\u003eThe set is HSS rather than solid cobalt alloy grade, so it may not match specialty cobalt or carbide bits for life on highly abrasive jobs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003ePiece count\u003c\/td\u003e\n\u003ctd\u003e115\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eHigh-speed steel with black and gold oxide finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTip angle\u003c\/td\u003e\n\u003ctd\u003e135 degree split point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShank type\u003c\/td\u003e\n\u003ctd\u003eRound straight 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\u003eSize range\u003c\/td\u003e\n\u003ctd\u003e1\/16' to 1\/2'\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eMetal indexed storage case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThis 115-piece HSS drill bit kit is a practical, value-packed choice for DIYers and light trade use, offering a useful size range, a self-centering 135 degree tip and a protective oxide finish. It delivers dependable performance on stainless steel, cast iron, wood and plastics for most home and shop projects, though professionals tackling continuous heavy stainless work may prefer higher-grade cobalt or carbide bits.\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 fully ground 135 degree split point and HSS construction allow drilling into stainless steel, though extreme or repetitive production work may stress the bits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat sizes are included?\u003c\/strong\u003e\u003cbr\u003eThe kit covers sizes from 1\/16' up to 1\/2' in jobber length increments for common drilling needs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the set include a storage case?\u003c\/strong\u003e\u003cbr\u003eYes, the bits come in a metal indexed storage case that keeps each size labeled and secured.\u003c\/p\u003e","brand":"GMTOOLS","offers":[{"title":"Default Title","offer_id":48196328751323,"sku":"B0F1Y1XVS3","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71wDWLzTIOL._SL1500.jpg?v=1770370651","url":"https:\/\/gearmusthave.com\/products\/115pcs-cobalt-drill-bits-set-1-16ft-1-2ft-durable-high-speed-steel","provider":"GearMustHave","version":"1.0","type":"link"}