{"product_id":"cobalt-number-size-drill-bit-set-1-60-m35-hss-jobber-drill-kit","title":"Cobalt Number Size Drill Bit Set #1-60 - M35 HSS Jobber Drill Kit","description":"\u003cp\u003eIn this review the Cobalt Number Size Drill Bit Set #1-60 is evaluated for metalworkers and hobbyists who need a wide range of precise holes in tough materials. The bottom line: this kit's biggest selling point is its complete span of number sizes and M35 cobalt construction, which make it useful when drilling stainless steel, cast iron and other hard metals while still handling wood and plastic. The set is best for users who value size variety and cutting performance over professional-rate lifetime toughness.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e60 Number Sizes:\u003c\/strong\u003e Includes number sizes #1 through #60, providing a continuous range from 0.228in to 0.040in so a single kit covers many drilling needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM35 Cobalt Construction:\u003c\/strong\u003e The M35 cobalt alloy offers harder cutting edges than standard HSS, which improves durability and performance on stainless steel and cast iron.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e135 Degree Point Tip:\u003c\/strong\u003e The split 135 degree tip helps with self-centering and reduces walk-off, making it easier to start holes accurately on metal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJobber Length Twist Design:\u003c\/strong\u003e Jobber length and spiral flutes clear chips efficiently and let the bits penetrate a variety of materials from soft metals to plastics and wood.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Case:\u003c\/strong\u003e The indexed storage case keeps bits organized by number size and protects flutes in transit, helping prevent loss and mix-ups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe kit suits home shop machinists, fabricators and DIYers who frequently switch between precise small diameters and must drill a range of metals, including stainless steel and cast iron. The full #1 to #60 selection removes the need to own multiple partial sets when working on mixed-material jobs.\u003c\/p\u003e\n\u003cp\u003eIt is less ideal for heavy production shops that require industrial longevity or carbide tooling for continuous high-volume stainless work; some buyers report bits dull or break under very heavy use, so professionals with high throughput should consider hardened specialty tooling instead.\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\u003eExtremely comprehensive size range lets you pick the exact number size without grinding or reaming.\u003c\/li\u003e\n\u003cli\u003eM35 cobalt composition gives better cutting performance on hardened metals than ordinary HSS.\u003c\/li\u003e\n\u003cli\u003e135 degree tip and twist geometry reduce walking and improve hole accuracy for starting holes.\u003c\/li\u003e\n\u003cli\u003eIndexed case provides neat organization and quick size identification on the job.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome users report edge dulling and occasional breakage during heavy use, so long-term durability can vary under extreme loads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eMACXCOIP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBit Count\u003c\/td\u003e\n\u003ctd\u003e60 pieces (#1-#60)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize Range\u003c\/td\u003e\n\u003ctd\u003e0.228in - 0.040in (5.79mm - 1.02mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eM35 cobalt high speed steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTip Angle\u003c\/td\u003e\n\u003ctd\u003e135 degree point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003eJobber length twist drills\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd\u003eIndexed protective storage case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Cobalt Number Size Drill Bit Set #1-60 is a practical, value-oriented kit for anyone who needs fine incremental sizes and better-than-average performance on hard metals. It represents solid value for hobbyists and small shops who drill a variety of materials, though those needing industrial-grade longevity under continuous heavy loads may prefer specialized carbide or industrial toolroom bits.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan these drill bits cut stainless steel?\u003c\/strong\u003e\u003cbr\u003eYes. The M35 cobalt composition and 135 degree point make them suitable for drilling stainless steel and other hardened metals when used with appropriate speed and lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre all sizes included from #1 to #60?\u003c\/strong\u003e\u003cbr\u003eYes. The kit contains number sizes #1 through #60, covering 0.228in down to 0.040in for precise small-diameter work.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow are the bits stored?\u003c\/strong\u003e\u003cbr\u003eThe set comes with an indexed storage case that keeps every bit in its labeled slot to protect flutes and simplify selection on the bench.\u003c\/p\u003e","brand":"MACXCOIP","offers":[{"title":"Default Title","offer_id":48264842871003,"sku":"B0CN1282PN","price":49.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71MVhl5-26L._SL1500.jpg?v=1776601462","url":"https:\/\/gearmusthave.com\/products\/cobalt-number-size-drill-bit-set-1-60-m35-hss-jobber-drill-kit","provider":"GearMustHave","version":"1.0","type":"link"}