{"product_id":"cobalt-drill-bit-set-21pc-m42-hss-jobber-length-durable-metal","title":"Cobalt Drill Bit Set 21Pc M42 HSS Jobber Length - Durable Metal","description":"\u003cp\u003eIn this review the COMOWARE 21pc Cobalt Drill Bit Set is evaluated for metalworkers and hobbyists who need a compact, versatile kit for hardened metals. The single biggest reason to consider this set is its use of 8% cobalt M42 high speed steel, which delivers noticeably better edge life and cutting through tough materials compared to standard HSS bits. For someone drilling stainless steel, cast iron or high temperature alloys, these bits offer a professional-grade option in a neat indexed case.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8% Cobalt M42:\u003c\/strong\u003e Provides extended tool life and improved wear resistance when drilling hard metals compared to ordinary carbon or HSS bits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e135 split point:\u003c\/strong\u003e The precise split point reduces walking on the workpiece, so holes start cleanly without the need for a center punch in many cases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully ground twist design:\u003c\/strong\u003e Precision grinding ensures chips evacuate smoothly and cutting remains consistent during use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold oxide finish and straight shanks:\u003c\/strong\u003e The coating helps reduce friction while round straight shanks fit a wide variety of chucks and drill drivers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJobber length set:\u003c\/strong\u003e The 21 sizes from 1\/16in to 1\/2in cover common shop and field needs without buying individual bits.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis set is aimed at tradespeople, fabricators and serious DIYers who frequently drill hardened metals such as stainless steel, cast iron and certain high temperature alloys, and who need a compact kit that travels to job sites. The M42 composition and split point make it appropriate for workshop tasks where longevity and clean starts matter.\u003c\/p\u003e\u003cp\u003eThose who primarily drill softwood, plastics or occasional light metal may find a cheaper HSS set sufficient, and users who require metric sizes or extremely long bits for deep holes should look for a different kit tailored to those needs.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh durability and heat resistance from 8% cobalt M42, making the bits suitable for stubborn metals.\u003c\/li\u003e\n\u003cli\u003eReduced walking and cleaner hole starts thanks to the 135 split point geometry.\u003c\/li\u003e\n\u003cli\u003eComplete coverage of common fractional sizes in one indexed storage case simplifies organization and transport.\u003c\/li\u003e\n\u003cli\u003ePrecision fully ground flute design helps chip clearance and cutting consistency.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome users report mixed durability under heavy industrial use, with occasional bits dulling or breaking sooner than expected.\u003c\/li\u003e\n\u003cli\u003eSet uses fractional sizes only, so metric users will need adapters or a different set.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eCOMOWARE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e8% Cobalt High Speed Steel M42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePoint Type\u003c\/td\u003e\n\u003ctd\u003e135 split point\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\u003eSet Size\u003c\/td\u003e\n\u003ctd\u003e21 pieces, jobber length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize Range\u003c\/td\u003e\n\u003ctd\u003e1\/16in to 1\/2in (fractional sizes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eIndexed plastic case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe COMOWARE 21pc M42 cobalt jobber set is a solid value for anyone who regularly drills hardened metals and needs a compact, organized kit. It combines durable 8% cobalt construction with a 135 split point and thoughtful storage, making it a strong choice for workshop and jobsite use, while those needing metric sizes or ultra-high production longevity should evaluate specialized options.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eCan these bits drill stainless steel?\u003c\/strong\u003e\u003cbr\u003eYes, the M42 cobalt composition and split point are well suited to drilling stainless steel and other hard metals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre the sizes fractional or metric?\u003c\/strong\u003e\u003cbr\u003eThe set contains fractional sizes from 1\/16in up to 1\/2in; it does not include metric sizes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the set include a storage case?\u003c\/strong\u003e\u003cbr\u003eYes, the bits come in an indexed plastic storage case for organized transport and protection.\u003c\/p\u003e","brand":"COMOWARE","offers":[{"title":"Default Title","offer_id":48657983176923,"sku":"B0CKL7QRWN","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71PMDBPh8VL._SL1500.jpg?v=1778593672","url":"https:\/\/gearmusthave.com\/products\/cobalt-drill-bit-set-21pc-m42-hss-jobber-length-durable-metal","provider":"GearMustHave","version":"1.0","type":"link"}