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Model#: MILN48-03-4405

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Milwaukee 48-03-4405 3/8 in. Square to 1/4 in. Shockwave Hex Adapter

Model#: MILN48-03-4405
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Milwaukee Shockwave Impact Duty Socket Adapters are engineered for extreme durability and up to 10x life. Broadly targeting cordless users, the Shockwave Impact Duty accessory line is not only ideal for heavy duty impact applications, but delivers a full system solution for all the user's drilling and fastening needs.
  • Made from a proprietary steel and a heat treat process for maximum strength and durability
  • Heavy duty construction for fastening capabilities in all impacts
  • Adapts a 3/8 in. square drive to work with 1/4 in. hex bits
  • 3/8 in. Square to 1/4 in. Shockwave Hex Adapter - 48-03-4405


Shipping Weight: 0.25 lbs.


Product Reviews


by PowerReviews
Milwaukee3/8 in. Square to 1/4 in. Shockwave Hex Adapter

(based on 1 review)

Reviewed by 1 customer

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(1 of 1 customers found this review helpful)


Adapter that can replace an entire tool


from South Dakota

About Me Professional

Verified Reviewer


  • Easy To Store
  • Easy To Use
  • Good Grip
  • Powerful


  • Bit Installation
  • Loose On Arbor

Best Uses

  • Gifts
  • Home Repair
  • In The Field
  • In The Workshop
  • In The Yard

Comments about 3/8 in. Square to 1/4 in. Shockwave Hex Adapter:

This adapter compliments my M18 Fuel 3/8" impact wrench very well. This adapter has remedied my need for an entire other tool, a 1/4" hex impact driver.

I mostly work on machinery, however, I used this adapter on my aforementioned impact wrench during the rebuild of our farm's original barn. It, coupled with one of Milwaukee's most powerful compact impact wrenches left no screw unturned.

While the adapter is a bit loose on the wrench's arbor, it cinches tight when pressure is applied to a screw head. It would fall off of the wrench if dropped, but not on it's own.

I also wish it would accept bits by just pushing them in. Instead, you must pull the collar back to install a bit. Other impact drivers I have owned had this feature, and I sure do miss it.

If I were a professional carpenter, I may wish to have a standalone 1/4" hex impact driver. But, even for driving bits when working on machinery, this adapter is worth it's weight in gold.

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Questions & Answers

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1 Question | 2 Answers
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  • 3/8 in. Square to 1/4 in. Shockwave Hex Adapter


    Does this adapter have a set screw or other means of tightening the adapter to the 3/8 anvil of the impact? I have a concern about it being a sloppy connection to the anvil.
    Asked on 2/6/2013 by Huck from Lake Tahoe, Nevada

    2 answers

    • A:

      This adapter does contain a set screw that can be used for tightening the adapter.

      Answered on 2/7/2013 by Community Answer from None
    • Staff Reviewer


      Yes, there is an opening on the side of the base for a set screw to be applied.

      Answered on 2/7/2013 by Ken from Atlanta, GA
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