{"product_id":"m35-cobalt-step-drill-set-1-4in-1-3-8in-19-step-size-stable","title":"M35 Cobalt Step Drill Set 1\/4in - 1-3\/8in (19 Step Size) - Stable","description":"\u003cp\u003eIn this review the M35 Cobalt Step Drill Set is presented as a purpose-built option for DIYers and professionals who need reliable hole enlargement across metal and softer materials. The single biggest reason to buy is its M35 cobalt construction combined with a four groove spiral flute design, which yields improved stability and longer life when cutting through stainless steel, aluminum, wood and plastic. The reviewer found it especially useful when drilling multiple hole sizes quickly without swapping bits and praised its sharpness and cutting speed.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM35 cobalt high speed steel:\u003c\/strong\u003e Provides higher hardness, red hardness and wear resistance so the bit holds an edge longer on hard materials.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour spiral flute step design:\u003c\/strong\u003e Reduces flex during cutting and improves stability for cleaner, more accurate holes compared with ordinary step drills.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide stepped range:\u003c\/strong\u003e Covers 1\/4in to 1-3\/8in across 19 steps so one bit replaces multiple individual sizes for faster workflow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiAlN coating:\u003c\/strong\u003e Adds surface hardness and thermal resistance to lower friction and help maintain cutting performance at higher temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e135 degree tip angle:\u003c\/strong\u003e The steeper tip is better suited to hard materials than a standard 118 degree point and helps start holes more precisely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended cooling:\u003c\/strong\u003e Using cutting oil or water spray during continuous work reduces temperature and extends service life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe set is ideal for DIYers, metal fabricators and maintenance technicians who frequently drill a range of hole sizes in thin to medium sheet metals, including stainless steel, and who value a single versatile tool over keeping many individual bits. The design suits projects where speed and repeatable accuracy matter, such as electrical panel work, bracket fabrication and retrofit installations.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include people who need extremely large diameter holes beyond 1-3\/8in or those who primarily drill deep, solid stock rather than thin sheets, since step drills are optimized for sheet work and through-hole enlargement rather than deep plunge drilling.\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\u003eDurable M35 cobalt construction delivers longer tool life and better performance on hard metals.\u003c\/li\u003e\n\u003cli\u003eFour groove spiral flute design improves stability and cutting speed for cleaner holes.\u003c\/li\u003e\n\u003cli\u003eTiAlN coating and 135 degree tip reduce heat and improve starting accuracy on stainless steel.\u003c\/li\u003e\n\u003cli\u003eOne bit covers 19 step sizes, saving time and tool changes on mixed-material jobs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRequires cutting oil or water spray for continuous high-speed use to prevent overheating and extend life.\u003c\/li\u003e\n\u003cli\u003eStep drills are not ideal for deep hole drilling or very large diameter cores beyond the listed range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBit material\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\u003eTiAlN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTip angle\u003c\/td\u003e\n\u003ctd\u003e135 degree\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize range\u003c\/td\u003e\n\u003ctd\u003e1\/4in to 1-3\/8in (19 steps)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlute design\u003c\/td\u003e\n\u003ctd\u003eFour spiral flute step drill\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eStainless steel, aluminum, wood, plastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe M35 Cobalt Step Drill Set is a practical, high-value tool for anyone who needs quick, accurate stepped holes across sheet metals and mixed materials. Its M35 cobalt body, TiAlN coating and four flute geometry combine to offer improved durability, cutting speed and hole quality, making it a smart single-bit solution for many shop and field tasks.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this drill bit handle stainless steel?\u003c\/strong\u003e\u003cbr\u003eYes, the M35 cobalt steel and TiAlN coating are specifically suited to stainless steel and other hard materials when used with proper cooling.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need lubricant when using this step drill?\u003c\/strong\u003e\u003cbr\u003eFor continuous or high-speed drilling it is recommended to apply cutting oil or spray water to reduce temperature and extend tool life.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat hole sizes does the bit cover?\u003c\/strong\u003e\u003cbr\u003eThe single bit covers stepped sizes from 1\/4in up to 1-3\/8in across 19 incremental steps.\u003c\/p\u003e","brand":"1WANYUE","offers":[{"title":"Default Title","offer_id":48250355319003,"sku":"B0BWYC1SV4","price":59.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71EFdCMAzcL._SL1500.jpg?v=1770919827","url":"https:\/\/gearmusthave.com\/products\/m35-cobalt-step-drill-set-1-4in-1-3-8in-19-step-size-stable","provider":"GearMustHave","version":"1.0","type":"link"}