SDS Plus 4CT MX4™ 1/4" X 10" X 12"

The Milwaukee 48-20-7335 SDS Plus 1/4" x 10" x 12" MX4™ Drill Bit is a professional-grade masonry bit engineered for high-speed drilling in concrete, brick, block, and reinforced concrete with embedded rebar.

Built with Milwaukee’s MX4™ 4-cutter solid carbide head, this bit is designed for maximum durability and cutting efficiency in tough materials. The four-cutter geometry helps maintain a precise hole diameter, improves stability when encountering rebar, and reduces binding compared to traditional 2-cutter bits.

Its breaker-point tip aggressively fractures concrete for faster penetration, while reinforced flutes efficiently remove dust and debris to reduce heat buildup and maintain consistent drilling performance. The wear mark indicator helps identify when the bit has reached its wear limit for ANSI compliance and safe continued use.

The 1/4-inch diameter is ideal for light-duty anchoring applications, and the 10-inch usable depth (12-inch overall length) provides extended reach for deeper drilling in structural or overhead applications.

Key Features:

• MX4™ 4-cutter carbide head for superior durability in rebar
• Breaker-point tip for faster drilling into concrete
• Reinforced flutes for improved debris removal and reduced vibration
• Wear mark indicator for service-life monitoring
• SDS-Plus shank fits all SDS-Plus rotary hammers
• Designed for reinforced concrete and masonry drilling

Ideal Applications:

• Anchor hole drilling in concrete and block
• Drilling through reinforced concrete with rebar
• Electrical, plumbing, and mechanical installations
• Commercial and residential construction work