{"product_id":"cobalt-drill-bit-1-2-in-twist-drill-bits-pack-of-5-m35-high-speed","title":"Cobalt Drill Bit 1\/2 in Twist Drill Bits Pack of 5 - M35 High Speed","description":"\u003cp\u003eIn this review the Cobalt Drill Bit 1\/2 in set is assessed for machinists, metalworkers and serious DIYers who need a durable bit that cuts harder steels. The bottom line: these are practical, industry-grade M35 bits that deliver sharp, reliable drilling on stainless steel, cast iron and other hard metals thanks to a 135 split point and a fully ground flute design. The included index storage case keeps the set organized, and while durability reports are mixed, the overall value and cutting performance make them worth considering for heavy-duty work.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/2 in size, 5 pieces:\u003c\/strong\u003e A full set of five 1\/2 in jobber length bits fits most power drills and covers common drilling needs without frequently swapping sizes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM35 cobalt construction:\u003c\/strong\u003e Industry grade M35 high speed steel with 5% cobalt offers increased hardness and wear resistance for drilling tougher materials.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e135 degree split point:\u003c\/strong\u003e The split point reduces walking at startup so holes start accurately without a center punch in many applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully ground spiral flute:\u003c\/strong\u003e Precisely ground flutes clear chips faster and reduce heat and friction for steadier cuts and longer edge life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndex storage case:\u003c\/strong\u003e A compact case keeps bits organized and protected between jobs, making transport and storage easier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile material use:\u003c\/strong\u003e Designed for stainless steel, hardened steel (below HRC38), cast iron and softer metals and plastics when drilling speed and pressure are managed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThese bits are best for hobby machinists, metal fabricators and contractors who frequently drill through stainless steel, mild steel, cast iron or similar hard metals and want a reliable, sharper edge than standard HSS bits. The set is also practical for vehicle repair and maintenance where tougher alloys appear.\u003c\/p\u003e\n\u003cp\u003eCasual DIYers who only drill wood or soft plastics might be better served by standard HSS or brad point bits that are lower cost. Also, users regularly working on extremely hardened steels above HRC38 should choose tooling rated for higher hardness instead of this M35 set.\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 cutting sharpness and accuracy with a 135 split point that reduces walking.\u003c\/li\u003e\n\u003cli\u003eGreater hardness and wear resistance from 5% cobalt M35 material compared with ordinary HSS bits.\u003c\/li\u003e\n\u003cli\u003eWell-ground flutes that help chip evacuation and reduce heat buildup during drilling.\u003c\/li\u003e\n\u003cli\u003eConvenient index storage case for organization and protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome customers report mixed durability under heavy industrial use, so edge life may vary by application and technique.\u003c\/li\u003e\n\u003cli\u003eNot intended for steels hardened above HRC38, which require specialized tooling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBit size\u003c\/td\u003e\n\u003ctd\u003e1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e5 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eM35 high speed steel with 5% cobalt\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\u003c\/td\u003e\n\u003ctd\u003eStraight shank, jobber length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded accessory\u003c\/td\u003e\n\u003ctd\u003eIndex storage case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended materials\u003c\/td\u003e\n\u003ctd\u003eStainless steel, cast iron, mild steel, aluminum, plastic, wood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Cobalt Drill Bit 1\/2 in pack is a solid choice for anyone who regularly drills tougher metals and needs sharper, longer-lasting bits than standard HSS provides. With M35 construction, a 135 split point and a storage case, it balances cutting performance and value, though users drilling very hardened steels should select specialty tooling. Overall it is a practical, cost-effective set for metalwork and heavier DIY jobs.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan these bits drill stainless steel?\u003c\/strong\u003e\u003cbr\u003eYes, they are designed for stainless steel and perform well when drilling at appropriate speeds with controlled pressure to avoid overheating.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these suitable for very hardened steel?\u003c\/strong\u003e\u003cbr\u003eNo, the manufacturer notes hardened steel must be below HRC38; harder steels require purpose-made carbide or specialized bits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the case keep bits organized for jobsite use?\u003c\/strong\u003e\u003cbr\u003eYes, the included index storage case stores the five bits securely for transport and prevents damage between uses.\u003c\/p\u003e","brand":"ZNXIMER","offers":[{"title":"Default Title","offer_id":48247431233755,"sku":"B0CLJ7NDJV","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71tDv5E3D-L._SL1500.jpg?v=1771001356","url":"https:\/\/gearmusthave.com\/products\/cobalt-drill-bit-1-2-in-twist-drill-bits-pack-of-5-m35-high-speed","provider":"GearMustHave","version":"1.0","type":"link"}