Milwaukee SDS Plus 4-Cutter MX4 Rotary Hammer Drill Bit

Milwaukee 48-20-7250 SDS Plus MX4 4-Cutter Carbide Drill Bit, 1-1/8" x 8" x 10"

The Milwaukee 48-20-7250 SDS Plus MX4 4-Cutter Carbide Drill Bit is purpose-built for rotary hammer drilling in concrete, block, and masonry. This bit uses an SDS Plus shank, allowing it to lock quickly and securely into SDS Plus rotary hammers without the need for a chuck key, while its MX4 four-cutter carbide tip design is engineered to bite into hard materials faster than standard two-cutter bits. Measuring 1-1/8" in diameter x 8" in usable drilling length x 10" overall length, this bit is sized for drilling holes to accommodate common anchors, fasteners, and rebar applications on concrete and masonry jobsites. Whether used for anchoring, electrical or mechanical rough-in, or general concrete drilling, the 48-20-7250 is designed to deliver consistent hole quality and long service life under repeated use.

Key Features

• Bit Size: 1-1/8" diameter x 8" usable length x 10" overall length, sized for drilling holes for anchors, fasteners, and other concrete or masonry applications requiring a larger-diameter bit.
• SDS Plus Shank: The SDS Plus shank design locks directly into SDS Plus rotary hammers, allowing for quick bit changes and efficient hammer-action energy transfer without a keyed chuck.
• MX4 4-Cutter Carbide Tip: A four-cutter carbide head design is engineered to increase drilling speed and extend bit life versus standard two-cutter carbide bits, helping reduce downtime on the jobsite.
• Durable Carbide Construction: The carbide-tipped cutting head resists wear from repeated impacts and abrasive concrete and masonry materials, supporting long-lasting performance over the life of the bit.
• Consistent Hole Quality: The four-cutter geometry is designed to help maintain accurate, consistent hole diameters from start to finish, supporting reliable anchor and fastener seating.
• Full-Length Bit Design: At 10" overall length, this bit provides the reach needed for drilling through block, brick, and standard concrete on typical construction and renovation jobsites.

Technical Specifications

• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Drilling anchor and fastener holes in concrete and masonry walls, floors, and slabs
• Rotary hammer drilling for electrical, plumbing, and mechanical rough-in work
• Commercial and residential construction and renovation projects
• General-purpose concrete, block, and brick drilling on the jobsite
• Repetitive drilling tasks requiring a durable, long-life carbide bit

Why Milwaukee?

Milwaukee engineers its MX4 carbide-tipped SDS Plus bits for the demands of professional jobsites, pairing a wear-resistant carbide tip with a four-cutter head design intended to drill faster and last longer than standard bits. The SDS Plus shank provides dependable compatibility with SDS Plus rotary hammers, so contractors and tradespeople can rely on consistent performance across repeated concrete and masonry drilling tasks. Backed by Milwaukee's reputation for jobsite-ready tool accessories, the 48-20-7250 is built to keep pace with demanding daily use on commercial and residential job sites.