8 PC SDS Plus MX4™ 4-Cutter Drill Bit Kit

The Milwaukee 48-20-7663 8 PC SDS Plus MX4™ 4-Cutter Drill Bit Kit is a professional-grade masonry drill bit set engineered for high-speed drilling in concrete, brick, block, and reinforced concrete with embedded rebar.

Each bit features Milwaukee’s MX4™ solid carbide 4-cutter head, designed to deliver maximum durability, faster drilling, and improved performance when encountering rebar. The 4-cutter geometry helps maintain a precise hole diameter, reduces walking, and prevents binding compared to standard 2-cutter bits.

A breaker-point tip aggressively fractures concrete for faster penetration, while the optimized flute design efficiently removes dust and debris to reduce heat buildup and extend tool life. The bits also include wear indicators to show when they have reached the end of their ANSI service life, helping maintain consistent drilling accuracy and safety.

This 8-piece kit includes a wide range of commonly used sizes for anchor installation and structural drilling, making it a versatile all-in-one solution for contractors and serious users working in concrete.

Key Features:

• MX4™ 4-cutter carbide heads for superior durability in rebar
• Breaker-point tips for fast, aggressive drilling
• Reinforced flutes for improved debris removal and reduced vibration
• Wear mark indicators for end-of-life visibility
• SDS-Plus shanks compatible with all SDS-Plus rotary hammers
• Comprehensive 8-piece professional kit

Ideal Applications:

• Drilling anchor holes in concrete, brick, and block
• Working through reinforced concrete with rebar
• Electrical, plumbing, and mechanical installations
• Commercial and heavy-duty construction work