SDS Plus 4CT MX4™ 3/8" X 4" X 6" Bulk 10

The Milwaukee 48-20-7915 SDS PLUS 4CT MX4™ 3/8" x 4" x 6" Bulk (10) is a contractor-focused masonry drill bit set designed for fast, precise, and durable drilling in concrete, brick, block, and reinforced concrete with rebar.

Each bit features Milwaukee’s MX4™ 4-cutter solid carbide head, engineered for high durability and consistent performance in hard aggregate. The four-cutter design improves hole accuracy, reduces walking, and helps prevent binding when encountering rebar compared to standard 2-cutter bits.

A breaker-point tip aggressively fractures concrete for faster drilling speed, while reinforced flutes efficiently remove dust and debris to reduce heat buildup and extend tool life. This design helps maintain stable, repeatable performance in high-volume drilling applications.

The 3/8-inch diameter is commonly used for medium anchor installations, and the 4-inch working depth (6-inch overall length) provides controlled drilling for standard fastening tasks. The bulk 10-pack format is ideal for contractors who need reliable bit supply for repeated jobsite use.

Key Features:

• MX4™ 4-cutter carbide head for high durability in rebar
• Breaker-point tip for fast, aggressive drilling
• Reinforced flutes for improved debris removal and reduced vibration
• SDS-Plus shank compatible with all SDS-Plus rotary hammers
• Bulk 10-pack for contractor productivity
• Designed for concrete, brick, and reinforced masonry

Ideal Applications:

• Anchoring into concrete and block
• Electrical, plumbing, and mechanical installations
• Drilling through light-to-moderate rebar in concrete
• General construction and renovation work