SDS Max 4CT MX4™ 1-1/2" X 18" X 23"

The Milwaukee SDS-MAX 4CT MX4™ 1-1/2" x 18" x 23" is a large-diameter, heavy-duty rotary hammer drill bit built for demanding concrete and reinforced concrete drilling. This size moves into high-load drilling, where both torque and bit durability are critical—especially when consistently encountering rebar.

Performance & Design

• Solid carbide 4-cutter head
  Delivers up to 5× longer life in concrete with rebar while maintaining cutting efficiency
• 4-cutter geometry
  Prevents binding and lock-up when hitting steel, improving control and reducing downtime
• Rebar guards
  Reinforce cutting edges to withstand repeated contact with embedded steel
• Centering tip
  Provides accurate hole starts—important for larger diameter drilling
• Variable flute design
  Improves dust removal, reducing heat buildup and maintaining drilling speed
• Breaker points
  Help pulverize material faster for more efficient drilling under heavy load

Size & Capacity

• Diameter: 1-1/2"
• Usable cutting length: 18"
• Overall length: 23"
• Shank: SDS-Max (large rotary hammers only)

Ideal For:

• Large anchor hole drilling
• Structural and seismic anchoring
• Reinforced concrete with rebar
• Commercial and industrial construction
• Mechanical, electrical, and plumbing penetrations

Quick takeaway:

This is a large-diameter, heavy-duty concrete bit—built for high-load drilling in reinforced concrete, where smaller bits lose efficiency and durability becomes critical.