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Model # 48-03-4405

Internet # 203114918

3/8 in. Square x 1/4 in. Hex Shockwave Impact Adapter

This item has been discontinued.
The Home Depot no longer carries this specific product.

$15.00 /each

  • Adapts 3/8 in. square impact wrench to fit 1/4 in. hex bits
  • Compatible with 3/8 in. ratchet
  • Constructed with Milwaukee proprietary heavy-duty steel




Model # 48-03-4405

Internet # 203114918

Store SO SKU # 1000671036

Transform your impact socket wrench into an impact driver with the 3/8 in. Square by 1/4 in. Hex Shockwave Impact Adapter from Milwaukee. Made with proprietary heat-treated steel, this dependable device is built to withstand frequent use and saves you the expense of having to buy a separate drill driver. Compatible with 3/8 in. square input drives, it allows you to utilize any 1/4 in. hex bit for a variety of tightening and unscrewing tasks.

  • Forged with proprietary steel and heat-treat process for maximum strength and durability
  • Heavy-duty construction for fastening capabilities in all impacts
  • Milwaukee Shockwave Impact Duty Socket Adapters are engineered for utmost durability and long-lasting use
  • Includes: (1) 3/8 in. square by 1/4 in. hex shockwave impact adapter

Info & Guides

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Drive Size (in.) 
1/4 in 
Product Depth (in.) 
Product Height (in.) 
Product Length (in.) 
Product Width (in.) 
Shank Diameter 
3/8 in 
Color Family 
Drill & Router Bit Type 
Drill Bit Type 
Bit Extender/ Holder 
Drill Bit Type(s) Included 
Bit Extender/ Holder 
Drive Style 
Number of Pieces 
Power Tool Product Type 
Drill & Router Bits 
Shank Style 
Tools Product Type 
Power Tool 


Rated 4.9 out of 5 by 11 reviewers.
Rated 5.0 out of 5.0 by Milwaukee 3/8 in. Square x 1/4 in. Hex Shockwave Impact Adaptor This item works very well. I think it should have been included in the M18 Fuel 18-Volt Brushless Lithium-Ion 3/8 in. Impact Wrench. There is even a spot in the case for it to fit. It is not stocked at Home Depot. I had to order online. December 10, 2013
Rated 5.0 out of 5.0 by Turns 3/8 impact wrench to impact driver! I just got it so can't tell you the longevity of it but it seems very good quality, I expect it to last. I attach it to my Milwaukee 3/8 impact wrench with friction ring and it holds on pretty well, like others have said it does have a little wobble to it, but when driving screws, you're applying pressure so it wont wobble anymore. $15 for this vs $130 for an impact driver, plus this is a lot stronger. You decide. May 24, 2013
Rated 5.0 out of 5.0 by Works great Bought this for my M12 Fuel impact, works great, quality is good too. Only regret was not buying it with the impact, wish I would've seen it sooner. June 30, 2015
Rated 5.0 out of 5.0 by Nothing But heavy Duty I purchased this adapter so I can use bits with my socket wrench. Now I can apply a high amount of torque when tightening a screw. This item should've been available in store not just online. June 22, 2015
Rated 5.0 out of 5.0 by Great upgade for a 3/8" impact driver This adapter allows the use of 1/4" hex bits. The problem I had in the past was my old impact (18v Dewalt hex driver) breaking the hex to 3/8 adapter. My new impact is a Dewalt 18v 3/8" sq. So with the Milwaukee adapter I can still use all my 1/4" hex bits. September 18, 2012
Rated 5.0 out of 5.0 by Makes my cordless impact drill more versatile This makes my 3/8 drive adaptable for other uses. It work well but is a little hard to put on and take off- which might be expected. It is the only one I was able to find anywhere so it was worth it to me. December 10, 2013
Rated 5.0 out of 5.0 What a money saver!!!... WOOT! WOOT!!!... This amazing adapter saved me the hassle of purchasing a drill... It easily converted my 450ft.lbs. Cordless Impact Wrench, into an awesome drill... brushed area on the adapter tends to slightly rust, but not a big deal... September 23, 2014
Rated 5.0 out of 5.0 by This product has great features Good features I can use on 3/8 to 1/4 drive bits,quick release December 20, 2013
  • 2015-11-26 T11:23:24.535-06:00
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