{"product_id":"milwaukee-48-20-5324-sds-max-tunnel-bit-3-1-8-inch-masonry","title":"Milwaukee 48-20-5324 Sds-max Tunnel Bit 3-1\/8 Inch Masonry","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe MILWAUKEE 48-20-5324 is a one-piece SDS-MAX tunnel bit engineered for deep, large-diameter hole drilling in concrete, concrete with rebar, brick, and block. The bit features a 3-1\/8-inch diameter and a 22-inch shaft length, supporting continuous deep hole drilling without repeated clearing. A 3-cutter carbide centering tip delivers precise starts and fast material removal. High-volume sloped flutes channel dust out of the bore efficiently, reducing heat buildup and keeping the cut moving. Carbide teeth are ground with rebar chamfers that shear through embedded rebar quickly while maintaining edge integrity and preventing tooth breakage. Licensed HVAC and construction trades reach for this bit when productivity and durability in reinforced concrete matter.\u003c\/p\u003e\u003cp\u003eThis tunnel bit is designed for use in SDS-MAX rotary hammers and performs in residential and commercial construction applications where deep, clean bores are required through reinforced concrete slabs, block walls, and brick masonry. Typical install scenarios include core-free penetrations for conduit, pipe, and mechanical sleeves where the high-volume flute design eliminates the need to stop and clear the hole during drilling.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3-cutter carbide centering tip for precise starts and fast grinding of concrete and rebar\u003c\/li\u003e\n\u003cli\u003eCarbide teeth with rebar chamfers shear through embedded rebar while maintaining maximum durability\u003c\/li\u003e\n\u003cli\u003eHigh-volume sloped flutes provide faster dust removal during deep hole drilling\u003c\/li\u003e\n\u003cli\u003e22-inch shaft length supports continuous deep drilling without hole clearing\u003c\/li\u003e\n\u003cli\u003eRobust head with concrete breakers for faster and more durable performance in rebar applications\u003c\/li\u003e\n\u003cli\u003eCompatible with SDS-MAX rotary hammer chucks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in SDS-MAX rotary hammers. Suitable for drilling concrete, concrete with rebar, brick, and block.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis bit is installed and operated by licensed contractors, electricians, plumbers, and mechanical tradespeople using SDS-MAX rotary hammers. Before drilling, confirm the work area is clear of unmarked utilities and consult applicable building codes for penetration locations. Eye protection, hearing protection, and respiratory protection appropriate for concrete dust are required. Do not use this bit in a standard drill chuck or non-hammer-drill mode.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBit Diameter\u003c\/strong\u003e: 3-1\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Length\u003c\/strong\u003e: 22 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Package Height\u003c\/strong\u003e: 25.38 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 4.49 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Carbide Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: SDS-MAX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Concrete, Concrete with Rebar, Brick, Block\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUOM\u003c\/strong\u003e: Each\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 0045242316007\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MILWAUKEE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 48-20-5324\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MILWAUKEE","offers":[{"title":"Default Title","offer_id":51343056470322,"sku":"48-20-5324","price":409.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310512169.jpg?v=1782015116","url":"https:\/\/voomisupply.com\/products\/milwaukee-48-20-5324-sds-max-tunnel-bit-3-1-8-inch-masonry","provider":"Voomi Supply","version":"1.0","type":"link"}