Milwaukee SDS MAX 4-Cutter Masonry Drill Bit, 1-3/8"X12"X17"

The 48-20-3975 Milwaukee SDS MAX 4-Cutter Masonry Drill Bit (1-3/8" × 12" × 17") is a premium concrete drilling bit built for SDS-MAX rotary hammers, especially in reinforced concrete and hard aggregate. It features a solid head carbide design for up to 5x longer life in concrete with rebar, plus rebar guards to increase durability when drilling through rebar. A sharp centering tip improves accuracy when starting holes in concrete and metal decking, and variable flutes help deliver up to 15% more holes per battery charge. It also includes wear mark indicators to show end-of-life and when the bit no longer meets ANSI requirements.

Country of Origin
German Made

Key Features / Specifications

• Model / Part Number: 48-20-3975
• Brand / Series: Milwaukee MX4™ (SDS MAX 4CT)
• Product Type: SDS MAX 4-cutter masonry / concrete drill bit
• Diameter: 1-3/8"
• Drilling Depth: 12"
• Overall Length: 17"
• Shank Type / Compatibility: Fits all SDS-MAX rotary hammers
• Head Design: Solid head carbide for up to 5x longer life in concrete with rebar
• Durability Feature: Rebar guards for increased durability in hard aggregate and rebar
• Start Accuracy: Sharp centering tip for exact spot drilling in concrete and metal decking
• Performance: Variable flutes for up to 15% more holes per battery charge
• Standards: Meets ANSI B212.15 to fit common anchors
• Wear Indicators: Wear mark indicators show end of life / ANSI compliance threshold
• Applications: Ideal for concrete with rebar and masonry
• Lock-Up Feature: Lock Up

Ideal For

• Drilling reinforced concrete where rebar contact is common
• SDS-MAX users needing a long bit: 12" drilling depth / 17" overall
• Accurate starts in concrete and metal decking with a centering tip
• Maximizing cordless productivity with variable flutes (more holes per charge)
• Anchor installations requiring ANSI B212.15 compliant hole sizing