{"product_id":"m35-four-spiral-flute-cobalt-step-drill-bit-set-1-8in-7-8in-durable","title":"M35 Four Spiral Flute Cobalt Step Drill Bit Set 1\/8in-7\/8in - Durable","description":"\u003cp\u003eIn this review the M35 Four Spiral Flute Cobalt Step Drill Bit Set is evaluated for metalworkers and DIYers who need a compact set of step bits that tackle a wide range of hole sizes. The bottom line: this three-piece set stands out for its \u003cstrong\u003eM35 cobalt HSS\u003c\/strong\u003e construction and industrial-grade \u003cstrong\u003eTiAlN coating\u003c\/strong\u003e, which together provide real heat and wear resistance when drilling thin metal, stainless steel, aluminum and typical workshop materials. It is best for users who value cutting stability and step range rather than a large assortment of individual bits.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-flute design:\u003c\/strong\u003e The extra flutes increase stability and deliver smoother, faster cutting with less wobble when stepping up hole sizes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiAlN coating:\u003c\/strong\u003e An industrial-grade coating improves oxidation resistance and thermal hardness to reduce wear during continuous drilling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM35 cobalt HSS:\u003c\/strong\u003e High red hardness and wear resistance make the bits suitable for stainless steel and other tougher sheet metals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide step range:\u003c\/strong\u003e Three bits cover 34 step sizes from 1\/8in to 7\/8in, letting you drill many common hole diameters without changing tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4in hex shank:\u003c\/strong\u003e The hex shank offers secure chuck engagement in handheld drills and quick bit changes in impact drivers and drivers with hex chucks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e135 cutting angle:\u003c\/strong\u003e The flatter face reduces self-wear and provides a larger contact area for cleaner, more efficient drilling.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThese bits are aimed at hobbyists, electricians, and metalworkers who frequently drill holes in thin metal, aluminum, copper, plastic and wood and want a compact, multi-step solution. The set is especially handy for tasks such as enlarging knockouts in panels or making clean openings for grommets and conduit fittings.\u003c\/p\u003e\n\u003cp\u003eUsers who need single-diameter carbide or high-volume production tooling may want a different solution; the set is optimized for versatility across many diameters rather than high-speed production on thick plate or composite laminates.\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 heat and wear resistance thanks to M35 cobalt and TiAlN coating, extending useful life under tougher conditions.\u003c\/li\u003e\n\u003cli\u003eFour-flute geometry improves stability and cutting speed compared with two-flute step bits.\u003c\/li\u003e\n\u003cli\u003eBroad step coverage with three bits replaces many single-size bits and reduces tool changes.\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 variable durability; a minority experienced dulling after limited use, so cooling and cutting oil are recommended for continuous tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\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\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eIndustrial-grade TiAlN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShank\u003c\/td\u003e\n\u003ctd\u003e1\/4in hex shank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStep range\u003c\/td\u003e\n\u003ctd\u003eThree bits covering 1\/8in-1\/2in, 1\/4in-3\/4in, 3\/16in-7\/8in (34 total sizes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCutting angle\u003c\/td\u003e\n\u003ctd\u003e135 degrees\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlute design\u003c\/td\u003e\n\u003ctd\u003eFour spiral flutes for stability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe M35 Four Spiral Flute Cobalt Step Drill Bit Set is a solid choice for DIYers and trade users who need a flexible, durable set for sheet metal, stainless steel and common workshop materials. Its combination of \u003cstrong\u003eM35 cobalt\u003c\/strong\u003e and \u003cstrong\u003eTiAlN coating\u003c\/strong\u003e delivers real thermal and wear benefits, and the four-flute design improves cut quality. Buy it if you want fewer bit changes and cleaner stepped holes; use cutting oil for long runs to get the best life from the bits.\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, M35 cobalt HSS and the TiAlN coating make them suitable for stainless steel and other harder sheet metals when used with proper feed and cooling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat drills accept the shank?\u003c\/strong\u003e\u003cbr\u003eThe 1\/4in hex shank fits most handheld drills, impact drivers and quick-change chucks that accept hex bits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo they need coolant?\u003c\/strong\u003e\u003cbr\u003eFor continuous or heavy work it is recommended to use cutting oil or spray water to cool the bits and minimize wear.\u003c\/p\u003e","brand":"AIMLENTOOL","offers":[{"title":"Default Title","offer_id":48647302119643,"sku":"B0CRGVRXWS","price":34.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71mJ-cOycML._SL1500.jpg?v=1778742292","url":"https:\/\/gearmusthave.com\/products\/m35-four-spiral-flute-cobalt-step-drill-bit-set-1-8in-7-8in-durable","provider":"GearMustHave","version":"1.0","type":"link"}