{"product_id":"irwin-11103-step-drill-bit-6-18mm-7-sizes-hss","title":"Irwin 11103 Step Drill Bit 6-18mm 7 Sizes Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe IRWIN 11103 is a high-speed steel step drill bit designed for drilling multiple hole sizes with a single tool. It steps from 6 mm up to 18 mm in diameter, covering 7 hole sizes in one bit. The 5 mm step length provides clean, defined transitions between sizes. The round shank with three flats measures 3\/8 inch in diameter and resists slipping in the chuck. The bright, uncoated finish indicates a general-purpose tool intended for everyday drilling tasks across a range of common materials. It is used by electricians, plumbers, HVAC technicians, and general tradespeople who need fast, repeatable hole sizing in sheet material and thin stock.\u003c\/p\u003e\u003cp\u003eThe IRWIN 11103 is suited for use in residential and light commercial trade applications where drilling through thin sheet goods is routine. Compatible materials include aluminum, brass, copper, laminate, mild steel, plexiglass, and wood. Its speed point geometry helps center the bit on the workpiece and reduces the need for a pilot hole. The single-piece construction and compact size make it practical for use in confined spaces typical of panel work, junction boxes, and pipe penetrations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSteps from 6 mm to 18 mm, providing 7 discrete hole sizes in one bit\u003c\/li\u003e\n\u003cli\u003e5 mm step length for clean, defined size transitions\u003c\/li\u003e\n\u003cli\u003eHigh-speed steel construction for durability in general-purpose drilling\u003c\/li\u003e\n\u003cli\u003e3\/8 inch round shank with three flats prevents chuck slippage\u003c\/li\u003e\n\u003cli\u003eSpeed point geometry aids self-centering and reduces walking\u003c\/li\u003e\n\u003cli\u003eWorks in aluminum, brass, copper, laminate, mild steel, plexiglass, and wood\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eFits any drill or drill press with a 3\/8 inch or larger chuck. Designed as a general-purpose step bit for use in thin sheet metals, plastics, and wood common to electrical, plumbing, and HVAC rough-in work.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eA licensed electrician, plumber, or HVAC technician typically uses step bits when sizing knockouts or penetrations in sheet metal panels and enclosures. Always de-energize electrical panels and shut off relevant systems before drilling into or near live equipment. Use appropriate cutting fluid when drilling harder metals to extend bit life. Secure the workpiece before drilling to prevent spinning or movement during the cut.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Hole Diameter\u003c\/strong\u003e: 6 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Hole Diameter\u003c\/strong\u003e: 18 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Hole Sizes\u003c\/strong\u003e: 7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep Length\u003c\/strong\u003e: 5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Round with Flats\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flats\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoint Type\u003c\/strong\u003e: Speed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Application\u003c\/strong\u003e: Aluminum, Brass, Copper, Laminate, Mild Steel, Plexiglass, Wood\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.214 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: IRWIN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 11103\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IRWIN","offers":[{"title":"Default Title","offer_id":51544004395314,"sku":"11103","price":76.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/506f358da7fa31419af1eccd00149259.jpg?v=1785922858","url":"https:\/\/voomisupply.com\/products\/irwin-11103-step-drill-bit-6-18mm-7-sizes-hss","provider":"Voomi Supply","version":"1.0","type":"link"}