Ratings may include incentivized customer reviews.
What Customers Are Saying
The product has widespread quality and design issues, with many customers reporting the chuck frequently locks up and becomes unable to release the drill bit, even after minimal use. Concerns were also raised about the chuck's inability to securely hold bits in place during use. Overall, the consensus is that this is a poorly designed and unreliable tool.
Customer review summary generated by AI, including incentivized reviews.Do not fully open
Would Not RecommendBought this to secure cement bits in my hammer drill. The chuck appears well made. It secured the bits and worked well in my application until I inadvertently opened the chuck to maximum. It jammed and will not close. Searching on-line for a solution, I learned that this has been a problem with this chuck sine it was introduced. Dewalt has yet to come up with a fix. Do not waste your money. Buy drill bits with 1/4 hex instead.
Sweepstakes
Chuck won’t give up my unibit lol
Would Not RecommendBought it to make things easier at work ended up making it worse ,got to admit tho before it got stuck on the chuck i was loving it,after the issue i hate it.
Sweepstakes
Hi-
We appreciate your feedback on this unit and are sorry to hear of the issue you are having with your product. This is not the kind of perf...
Sucks
Would Not RecommendBought this to try and make things easier at work,got my unibit stuck which is more expensive than the chuck itself trying to figure out how to disassemble the chuck
From dewalt.com
No surprizes
Would RecommendI expected no surprizes with this purchase and the Rotary Chuck Adapter provided me with outstanding results when in use.
Verified PurchaserSweepstakes
Stuck open
Would Not RecommendI bought this, worked alright for an hour. Now it is stuck open. It will not close to fit around the bit. Ive tried everything. Seems like many are having an issue with it not releasing the bit, but mine is doing the opposite. Very flawed product. I'll be returning it.
From dewalt.com
Not Great
Would Not RecommendI bought this for my impact in order not to have to carry both drill and impact but was disappointed because it wouldn't release my drill bit. I have been in construction for a long time and know how to release a bit but couldnt get it to work. DeWalt is all i use and have rarely ever been disappointed in a product as much as this one.
From dewalt.com
Expensive Piece of Junk
Would Not RecommendI have a bit stuck in the Chuck for nearly a year now. Backing the Chuck up only removes the impact stem attachment. Everyone is having the same issue - why hasn’t DeWalt addressed this as of yet. Because of this I won’t buy another DeWalt product simply due to the lack of quality.
From dewalt.com
Great product except...
Would RecommendIt's a great product except that it has a tendency to break when using it with an impact drill. I used it once with a uni-bit in my impact drill to drill out a hole in sheet metal a little bigger. The adapter jammed and I could not use it again as it would not tighten down on another drill bit. I had to return it for a new one.
Verified PurchaserSweepstakes
Love the idea, needs to go back to R&D.
Love the idea of this adapter but the overall design is a little flawed. Ended up tigging the adapter to the chuck to avoid the hex bit unthreading out of the chuck. Now it operates perfect. Having the hex-bit portion threaded into the chuck probably looked good in CAD... but without any retention device, it just screws right out. Boo. Expected more from Dewalt and Japan.
From dewalt.com
Will not function or adjust to open or close. Wasted cost of unit. Bad product. Do not purchase.
Hi, we're sorry to hear of the trouble you are having with the DW0521. We would appreciate the chance to speak with you and assist you with warranty....
Locks up bits stuck on tool
I bought this tool almost 2 weeks ago first time using it and my bit is stuck i do not recommend getting this tool or using it
From dewalt.com
Very good chuck
Would RecommendI have been using this chuck constantly for the last month and find that it works well with both large and small diameter drills. It does a good drilling any size hole.
Verified PurchaserSweepstakes
Works Great
Would RecommendWorks as designed. A little on the heavy end though.
Verified PurchaserSweepstakes

Hi-
We appreciate your feedback on this unit and are sorry to hear of the issue you are having with your product. This is not the kind of perf...