{"product_id":"irwin-ir10221-step-drill-bit-set-13-16-to-1-3-8-inch","title":"Irwin IR10221 Step Drill Bit Set 13\/16 to 1-3\/8 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe IRWIN IR10221 is a step drill bit set designed for cutting clean, precise holes in sheet metal, plastic, and thin-stock materials up to 1\/8 inch thick. The set covers a diameter range from 13\/16 inch up to 1-3\/8 inch in 1\/16 inch increments, giving technicians 10 graduated steps in a single bit. The 1\/2 inch shank fits standard three-jaw chucks on corded and cordless drills. This tool is well suited for electricians, HVAC installers, and plumbers who need to punch through enclosures, panels, and thin pipe fittings on the job.\u003c\/p\u003e\n\u003cp\u003eStep drill bits in this size range are commonly used in light commercial and residential work where knockout punches are impractical or unavailable. Typical applications include drilling conduit knockouts in electrical enclosures, enlarging existing holes in sheet metal ductwork, and creating clean pass-throughs in thin plastic junction boxes. The graduated step design eliminates the need to change bits when stepping through multiple hole diameters in a single material.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDiameter range: 13\/16 inch to 1-3\/8 inch in 1\/16 inch steps\u003c\/li\u003e\n  \u003cli\u003e10 graduated steps in a single bit body\u003c\/li\u003e\n  \u003cli\u003e1\/2 inch shank for compatibility with standard drill chucks\u003c\/li\u003e\n  \u003cli\u003eRated for material thickness up to 1\/8 inch\u003c\/li\u003e\n  \u003cli\u003eSingle bit replaces multiple standard twist drill sizes in the covered range\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with standard 1\/2 inch three-jaw drill chucks on corded and cordless drills. Suitable for sheet metal, thin plastic, and similar light-gauge materials up to 1\/8 inch thick.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eStep drill bits in this range are typically installed and used by electricians, HVAC technicians, and plumbers during rough-in and panel work. Secure the workpiece firmly before drilling and use appropriate eye protection. Apply steady, moderate pressure and allow the stepped geometry to guide the bit through the material without forcing. Ensure the drill chuck is fully tightened onto the 1\/2 inch shank before operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Diameter\u003c\/strong\u003e: 13\/16 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Diameter\u003c\/strong\u003e: 1-3\/8 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncremental Step Size\u003c\/strong\u003e: 1\/16 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Steps\u003c\/strong\u003e: 10\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/2 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Material Thickness\u003c\/strong\u003e: 1\/8 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 038548102214\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: IR10221\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IRWIN","offers":[{"title":"Default Title","offer_id":51347902595378,"sku":"IR10221","price":108.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310499368.jpg?v=1782115908","url":"https:\/\/voomisupply.com\/products\/irwin-ir10221-step-drill-bit-set-13-16-to-1-3-8-inch","provider":"Voomi Supply","version":"1.0","type":"link"}