{"product_id":"ezarc-m35-cobalt-step-drill-bit-13-steps-imperial-3-13mm-altin","title":"EZARC M35 Cobalt Step Drill Bit \/ Unibit – 13 Steps, 1\/8\"–1\/2\" (3–13mm), AlTiN Coated, Spiral Flute, Hex Shank, For Metal \u0026 Stainless Steel","description":"\u003ch2\u003e13 Steps. 1\/8\"–1\/2\" (3–13mm). M35 Cobalt. AlTiN Coated. One Bit, Every Size.\u003c\/h2\u003e\u003cp\u003eSheet metal, stainless steel, aluminium, brass, copper, cast iron — the \u003cstrong\u003eEZARC M35 Cobalt Step Drill Bit\u003c\/strong\u003e (also known as a unibit or cone drill bit) cuts 13 precise hole sizes in a single bit, eliminating the need to swap between multiple drills. M35 cobalt high-speed steel delivers superior hardness and toughness over standard HSS, and the AlTiN coating (89 HRC) withstands temperatures up to 900°C for all-day cutting performance. The triple-flute C-profile cutting edge gives 2× the cutting speed of standard step drills with enhanced stability and reduced deviation.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e13 Step Sizes\u003c\/strong\u003e — 1\/8\", 5\/32\", 3\/16\", 7\/32\", 1\/4\", 9\/32\", 5\/16\", 11\/32\", 3\/8\", 13\/32\", 7\/16\", 15\/32\", 1\/2\" (approx. 3–13mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM35 Cobalt HSS\u003c\/strong\u003e — superior hardness, toughness and bending strength vs standard HSS; ideal for harder materials\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlTiN Coating (89 HRC)\u003c\/strong\u003e — aluminium titanium nitride; resists heat up to 900°C, wear and corrosion; outlasts black oxide coatings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple-Flute Spiral Design\u003c\/strong\u003e — enhanced stability; reduces deviation during cutting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-Profile Cutting Edge\u003c\/strong\u003e — smoother cutting; 2× faster than standard step drills\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex Shank\u003c\/strong\u003e — fits standard drill chucks and quick-release hex chuck systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Materials\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMild steel and medium hardness steel (sheet up to 3mm \/ 1\/8\")\u003c\/li\u003e\n\u003cli\u003eStainless steel (sheet up to 1mm)\u003c\/li\u003e\n\u003cli\u003eAluminium, brass, copper and cast iron\u003c\/li\u003e\n\u003cli\u003eGalvanised pipe and low-carbon steel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eUsage Tips\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eUse low speed and light pressure until reaching the desired depth\u003c\/li\u003e\n\u003cli\u003eApply cutting oil or water-soluble lubricant to reduce friction, heat and debris\u003c\/li\u003e\n\u003cli\u003eStart-up speed may be slower due to the larger cutting angle — this is normal\u003c\/li\u003e\n\u003c\/ul\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sb987341857a9424b9aa029fe05591826K.jpg\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S21ba41ce99c149598ead0eb1f93c3c2cZ.jpg\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S30ce6cdbf0c9404d8816010a5982a0d8a.jpg\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sd0efe08fa9bc4a76af18708401252bc63.jpg\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sbb3ef19d07c64be590de68efb9f1a6236.jpg\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sb9df1857478f4454a0c2e38dcabd3cdfN.jpg\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S8f4f4c29b92a464d8fd39a8a75622689J.jpg\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S4c9f00cab32e4e0ba87e3f8b534a3d3bv.jpg\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/Sb7a88365072645efb4f95083901775f1N.jpg\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S6947a965d81646afbfec61a93aa6cb19d.jpg\"\u003e\u003cimg src=\"https:\/\/ae01.alicdn.com\/kf\/S71f76e486a5d425b95de8100f9af3fe9V.jpg\"\u003e","brand":"EZARC","offers":[{"title":"Step Drill Bit \/ Hexagonal","offer_id":49852290564400,"sku":"6fe95a77-87d8-47cd-b959-2f101882bc73","price":14.38,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/4260\/6640\/files\/9277b8eaa712c7203570c810922766d1.jpg?v=1748365913","url":"https:\/\/www.adamsallsorts.co.uk\/products\/ezarc-m35-cobalt-step-drill-bit-13-steps-imperial-3-13mm-altin","provider":"Adams Allsorts","version":"1.0","type":"link"}