Pros

  • Offers convenience by eliminating the need for air hoses, unlike pneumatic wrenches.
  • Delivers exceptional power for removing stubborn bolts and nuts, outperforming some air impact wrenches.
  • Easily removes rusty bolts from assemblies, such as the AMC 242 flywheel.
  • Suitable for higorque tasks like driving lag screws and changing tires.
  • Viewed as a good investment overall with reliable performance for heavuty applications.
  • Portability makes it ideal for road calls and oite repairs.
  • Comes with a robust warranty of three years, extendable to five years.
  • Considered a valuable addition to any mechanic's toolbox for its power and versatility.

Cons

  • Struggles to loosen higorque bolts, failing on some applications like Jeep JK lug nuts.
  • Weighs over 6 pounds, making it less portable and more challenging to fit into tight spaces.
  • Actual torque output may be significantly lower than the claimed 350 fbs, with some users experiencing only around 80 ft-lbs.
  • Lacks adjustable torque settings, limiting precise control during use.
  • May produce a melting plastic smell when used heavily.
  • Not effective as a replacement for air tools in demanding automotive repair tasks.
  • Disappointment noted among users for not performing as marketed, especially for automotive usage.

Bottom Line

The CRAFTSMAN V20 Cordless Impact Wrench (CMCF900B) offers portability and significant power for certain heavy-duty applications, making it handy for home garage use and on-the-go repairs. However, users expecting it to match the performance of air tools in all scenarios may find it lacking, specifically regarding the real-world torque output. For those seeking superior performance, especially in demanding automotive settings, you might want to explore alternatives like higher-end models from Milwaukee which have shown better results in similar tasks.

Lowest at Amazon
$189.00 at Amazon
Lowest at any Popular Retailer
$93.60 at AliExpress
How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from 17 retailers to give you the short version.

Where to Buy

Prices last updated: June 9th 2026 2:57 pm
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