Milwaukee SDS PLUS 4-Cutter MX4™ 5/16" X 12" Drill Bit 48-20-8344

MAXIMUM REBAR ENDURANCE FOR HIGH-VOLUME ANCHORING

High-duty cycle concrete drilling demands a bit that won't seize the moment it hits structural steel. The MX4™ series utilizes a solid head carbide design that maintains structural integrity under extreme heat and friction. By integrating rebar guards, Milwaukee has effectively eliminated the "lock-up" common with 2-cutter bits, protecting both the tool's internal clutch and the operator's wrists. The variable flute geometry is a critical mechanical advantage, clearing spoils rapidly to prevent heat buildup—a primary killer of carbide—while ensuring your cordless rotary hammer delivers more holes per charge by reducing rotational resistance and mechanical drag.

• / Solid Head Carbide: Delivers up to 5X longer life in reinforced concrete compared to standard tipped bits.
• / 4-Cutter Geometry: Prevents binding and lock-up when encountering rebar, ensuring consistent hole roundness for secure anchoring.
• / Variable Flute Design: Optimizes dust extraction to reduce friction and thermal stress, extending battery runtime on M18 FUEL platforms.
• / Wear Mark Indicator: Provides a visual gauge to ensure holes remain compliant with ANSI B212.15 tolerances for critical anchor placement.

WHAT'S IN THE BOX

(1) SDS PLUS 4-Cutter MX4™ 5/16" X 12" Drill Bit (48-20-8344)