{"product_id":"milwaukee-48899372-cobalt-alcrn-step-drill-bit-4-20mm","title":"Milwaukee 48899372 Cobalt ALCrN Step Drill Bit 4-20mm","description":"\u003ch4\u003e\u003cstrong\u003eMilwaukee 48899372 Cobalt AlCrN Step Drill Bit 4-20mm\u003c\/strong\u003e\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Milwaukee 48899372 Cobalt AlCrN Step Drill Bit 4-20mm is a professional-grade drilling accessory engineered for fast, precise and efficient hole cutting in steel and stainless steel. Featuring advanced Aluminium Chromium Nitride (AlCrN) coating, this high-performance step drill bit delivers up to 10 times longer service life compared with standard Milwaukee step drill bits, making it an excellent choice for electricians, metal fabricators, mechanical engineers and maintenance professionals.\u003c\/p\u003e\n\n\u003cp\u003eDesigned with Milwaukee RAPID STRIKE TIP technology, the drill bit provides accurate starting without wandering across the workpiece. Its innovative tip geometry enables fast drilling without the need for a pilot hole, helping reduce preparation time and improve productivity. The specially designed cutting steps also minimise snagging and material deformation, providing smoother and more controlled drilling, particularly when used with cordless power tools.\u003c\/p\u003e\n\n\u003cp\u003eThe optimised two-flute cutting geometry features precision-ground, sharpened edges that deliver up to twice the cutting speed compared with conventional Milwaukee step drills. This efficient design supports smoother cutting and improved material removal when drilling through suitable steel and stainless steel components.\u003c\/p\u003e\n\n\u003cp\u003eFeaturing 10 cutting steps across a 4-20mm diameter range, the Milwaukee 48899372 allows users to create different hole sizes with a single drill bit. The 8mm three-flat secure grip shank helps prevent slipping inside the drill chuck while ensuring effective torque transmission. Laser-engraved size markings provide clear, long-lasting visibility, making it easier to select the required drilling diameter during installation and fabrication work.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-20mm Step Drilling Range:\u003c\/strong\u003e Provides multiple hole diameters using a single drill bit, reducing the need for frequent tool changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdvanced AlCrN Coating:\u003c\/strong\u003e Aluminium Chromium Nitride coating delivers excellent wear resistance and extended durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 10 Times Longer Life:\u003c\/strong\u003e Designed to provide up to 10 times the service life of standard Milwaukee step drill bits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for Steel and Stainless Steel:\u003c\/strong\u003e Engineered for professional metal drilling applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRAPID STRIKE TIP Technology:\u003c\/strong\u003e Enables accurate drilling starts without wandering and eliminates the need for pre-drilling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti-Snag Cutting Geometry:\u003c\/strong\u003e Specially designed tip and steps help reduce drill jamming and material deformation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimised Two-Flute Design:\u003c\/strong\u003e Precision-ground cutting edges provide up to twice the cutting speed and smoother drilling performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10 Cutting Steps:\u003c\/strong\u003e Allows convenient drilling of different hole diameters within the 4-20mm range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8mm Three-Flat Secure Grip Shank:\u003c\/strong\u003e Helps prevent slipping in the drill chuck and supports efficient torque transmission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLaser-Engraved Size Markings:\u003c\/strong\u003e Provides clear, durable diameter identification for accurate hole sizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCordless Tool Compatibility:\u003c\/strong\u003e Designed to deliver controlled drilling performance when used with suitable cordless drills.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Construction:\u003c\/strong\u003e Suitable for demanding electrical installation, fabrication and maintenance applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eBrand: Milwaukee\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: 48899372\u003c\/li\u003e\n\u003cli\u003eProduct Type: Cobalt AlCrN Step Drill Bit\u003c\/li\u003e\n\u003cli\u003eDrilling Diameter Range: 4-20mm\u003c\/li\u003e\n\u003cli\u003eNumber of Steps: 10\u003c\/li\u003e\n\u003cli\u003eCoating: Aluminium Chromium Nitride (AlCrN)\u003c\/li\u003e\n\u003cli\u003eTip Technology: RAPID STRIKE TIP\u003c\/li\u003e\n\u003cli\u003eCutting Geometry: Optimised Two-Flute Design\u003c\/li\u003e\n\u003cli\u003eShank Type: Three-Flat Secure Grip\u003c\/li\u003e\n\u003cli\u003eShank Diameter: 8mm\u003c\/li\u003e\n\u003cli\u003eOverall Length: 62mm\u003c\/li\u003e\n\u003cli\u003eSize Markings: Laser Engraved\u003c\/li\u003e\n\u003cli\u003eSuitable Materials: Steel and Stainless Steel\u003c\/li\u003e\n\u003cli\u003ePack Quantity: 1 Piece\u003c\/li\u003e\n\u003cli\u003eEAN Code: 045242603862\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSuitable Applications\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eDrilling accurate 4-20mm holes in steel and stainless steel\u003c\/li\u003e\n\u003cli\u003eCreating cable entry holes in suitable metal electrical enclosures\u003c\/li\u003e\n\u003cli\u003eElectrical installation and control panel fabrication\u003c\/li\u003e\n\u003cli\u003eMetalworking and sheet metal fabrication\u003c\/li\u003e\n\u003cli\u003eMechanical engineering and workshop drilling\u003c\/li\u003e\n\u003cli\u003eInstallation of metal brackets and mounting components\u003c\/li\u003e\n\u003cli\u003eMaintenance and repair of steel equipment\u003c\/li\u003e\n\u003cli\u003eProfessional drilling applications using suitable cordless or corded drills\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy Choose the Milwaukee 48899372 Step Drill Bit?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Milwaukee 48899372 combines durable AlCrN coating, RAPID STRIKE TIP technology and optimised two-flute cutting geometry to deliver reliable drilling performance. Its 10-step design reduces the need to change drill bits when producing different hole sizes, while the secure grip shank and laser-engraved markings improve control and convenience. For professionals regularly drilling steel and stainless steel, this step drill bit offers an efficient and versatile cutting solution.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eData Sheet:\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/api.milwaukeetool.eu\/fact-tag-generator\/public-generation\/generate?agilityid=511482\u0026amp;facttagsize=1\u0026amp;horizontal=true\u0026amp;cultureCode=en-GB\" title=\"Milwaukee 48899372 Cobalt AlCrN Step Drill Bit 4-20mm Data Sheet\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eClick Here for Data Sheet\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"Milwaukee","offers":[{"title":"Default Title","offer_id":67740238152071,"sku":"48899372","price":66.05,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0553\/2349\/2557\/files\/48899372--Hero_1.jpg?v=1792408930","url":"https:\/\/westbasedirect.com\/products\/milwaukee-48899372-cobalt-alcrn-step-drill-bit-4-20mm","provider":"West Base Direct","version":"1.0","type":"link"}