Milwaukee 48-20-3954 1" x 21" (16" Drilling Depth) 4-Cutter Rotary Hammer Drill Bit, Carbide, SDS-Max
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Manufacturer Milwaukee Tool
Mfg Catalog # 48-20-3954
North Coast Part # 217062


  • Breaker points for up to 20% faster drilling speeds
  • Rebar guards for increased DuraGuard in hard aggregate and rebar
  • Variable flutes for up to 15% more holes per battery charge
  • Reinforced flutes to avoid bit breakage
  • Wide flute entrance for increased faster dust removal
  • Wear mark indicators to indicate end of life
  • Centering tip of exact spot drilling
  • ANSI specified to fit common anchors


  • Bit Diameter: 1"
  • Bit Material: Carbide Tipped
  • Case Included: No
  • Chuck Fitment: SDS-Max
  • Shank Style: SDS-Max
  • Bit Type: Percussion
  • Flute Length (in): 4.0
  • Length (in): 21.0
  • Package Contents: (1) SDSMAX 4CT 1" X 17" X 21" (48-20-3954)
  • Recommended Safety Equipment: Safety Glasses
  • Shank Diameter (in): 1.0
  • Color Coded: No
  • Etched / Stamped Size Identification: No
  • Single / Double Ended: Single
  • Drilling Depth (in): 16.0


UPC 04524210221
Item Long Description Milwaukee SDS-Max drill bits provide faster drilling speeds, increased life, and more cordless efficiency. Breaker point pulverize the material leading to up to 20% faster drilling speeds. Rebar guards protect the bit when hitting hard aggregate and rebar leading to longer life. Variable flutes remove the dust out of the hole more efficiently resulting in up to 15% more holes per battery charge. Wide flute entrances lead to faster drilling speeds, while reinforced flutes prevent bit breakage, rendering increased durability in tough concrete applications. The centering tip allows for exact spot drilling. All SDS-Max drill bits meet the ANSI specification for drilling holes for anchor applications and include wear mark indicator when signifying when the bit no longer meets the ANSI spec.
GTiN 00045242102211
Length 21.0 in
Diameter 1 in
Material Carbide Tipped
Applications For Fast Bit Changes and Efficient Power Transfer from Hammer to Bit
Shank Type SDS-Max
Pkg Qty 1 Pack
Family Brand Name Milwaukee
Overall Length 21 in
Sub Brand SDS
Type 4-Cutter Head
Cutting Depth 16 in
Used With Rotary Hammer Drills
Width 1 in
Height 1 in
Shank Diameter 1.0 in
Flute Length 4.0 in
Drilling Depth 16.0 in

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