The Milwaukee® 7-1/2" Extension for Thick Wall Core Bits expands your drilling capacity. Made of high-quality steel, the extension extends your drilling by up to 7-1/2". It attaches easily to Spline and SDS Max Core Bit Adapters and features smooth, tough thin core construction for dependability. For deeper drilling, use the extension with a Milwaukee SDS Max or Spline adapter shank in 12" and 18" lengths.

 

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