{"product_id":"milwaukee-tool-48-20-5484-rotary-hammer-drill-bit-4-in","title":"Milwaukee Tool 48-20-5484 Rotary Hammer Drill Bit 4 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MILWAUKEE TOOL 48-20-5484 is a carbide-tipped rotary hammer drill bit designed for heavy-duty core drilling and large-diameter hole applications in concrete, masonry, and similar hard materials. Built with a spline shank for positive engagement with compatible rotary hammer chucks, this bit delivers consistent torque transfer under load. The carbide-tipped cutting face handles the abrasion and impact demands of demolition and new-construction drilling. At 4 inches in diameter with a 3-inch usable flute length and a 22-inch overall length, it reaches deep into walls, slabs, and footings where standard bits fall short. Skilled tradespeople in electrical, plumbing, HVAC, and structural work rely on this size for conduit and pipe penetrations.\u003c\/p\u003e\n\u003cp\u003eThis bit is suited for commercial and residential construction where large-diameter penetrations are required through concrete block, poured concrete, or masonry walls. Typical applications include core drilling for plumbing stub-outs, large conduit runs, HVAC ductwork penetrations, and similar through-wall openings. The 22-inch overall length provides reach for thick foundation walls and deep structural members without requiring an extension.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCarbide-tipped cutting face for durability in concrete and masonry drilling\u003c\/li\u003e\n  \u003cli\u003eSpline shank provides secure, positive engagement in spline-drive rotary hammer chucks\u003c\/li\u003e\n  \u003cli\u003e4-inch diameter for large conduit, pipe, and duct penetration work\u003c\/li\u003e\n  \u003cli\u003e3-inch usable flute length for effective debris clearing during drilling\u003c\/li\u003e\n  \u003cli\u003e22-inch overall length for extended reach into thick walls and slabs\u003c\/li\u003e\n  \u003cli\u003eHigh speed steel body construction supports repeated heavy-impact use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with spline-drive rotary hammer drills. Verify that the host tool accepts spline shank accessories before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and use of this bit should be performed by qualified tradespeople familiar with rotary hammer operation and concrete drilling procedures. Disconnect power to the rotary hammer before inserting or removing the bit from the chuck. Wear appropriate PPE including eye protection and hearing protection during drilling operations. Follow applicable OSHA and local safety codes when drilling into structural concrete or masonry.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Diameter\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Spline\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrill Bit Material\u003c\/strong\u003e: Carbide Tipped, High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUsable Flute Length\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 22 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 26 inches H x 4 inches W x 4 inches L\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 8 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27111543\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: MILWAUKEE TOOL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 48-20-5484\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MILWAUKEE","offers":[{"title":"Default Title","offer_id":51695719252274,"sku":"48-20-5484","price":397.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9a39964ab1cef8cb7e93b926df790f35.jpg?v=1788337733","url":"https:\/\/voomisupply.com\/products\/milwaukee-tool-48-20-5484-rotary-hammer-drill-bit-4-in","provider":"Voomi Supply","version":"1.0","type":"link"}