Rated 3.1 out of 5 by 35
Rated 5.0 out of 5.0 by FunWithElectronics Works Great!!
Ive read the reviews, and dont agree with most! Purchased this to hold a .04" (1.02mm) drill bit, and it works excellent. Common mistake, this replaces the collet(s), its basically a one size fits from 1/32" thru 1/8" shanks, so you can use it with most any dremel bits/shanks. It is not wrench free, you must use the shaft lock button and the dremel wrench to open and close the chuck. Works great for making PC Board projects.
March 6, 2016
Rated 5.0 out of 5.0 by JBarleycorn It works and does what it says it will
I have a Dremel Moto-Tool Model 245-5 and, based on the numerous different models mentioned that it fits, took a chance that mine was one of them. (I just couldn't imagine even "Corporate" changing the collet size and the number of Threads Per Inch [tpi] for one model in an entire successful line of similar sized products.) Anyway, it fits and, as one poster mentioned, if you use the collet wrench when necessary, it's a breeze to change tools of different shaft/shank sizes and drill bits between ¹⁄₃₂" and ⅛". Just keep it clean and, occasionally, lightly lube it. I'd suggest powdered graphite on the threads only instead of a silicon based liquid spray, just to keep the shanks or bits from slipping.
May 29, 2016
Rated 5.0 out of 5.0 by Fred WOW they should ship this as standard equipment
This makes changing attachments so much easier and quicker, Dremel should install it as standard equipment and dump the old style chuck that is a poor design
October 27, 2015
Rated 1.0 out of 5.0 by DLov Keyless 4486 chuck
How about casting a hex portion on the chuck in between or above the knurled portions. That way when the chuck tightens itself a little too tight you may be able to use just a little bit of leverage applied by the collet key wrench that come with the Dremel kit. I have had keyless chuck battery operated drill that have had similar
problems. It is more than a little annoying when it happens.
Figure incorporate this solution and I would change my rating
April 6, 2016
Rated 1.0 out of 5.0 by Pete the handyman Second chuck to seize
I had previously replaced the chuck that came with the tool after it had seized up and no amount of effort could free it. Now the replacement chuck has also seized up. I use my Dremel tool occasionally so it's not as if I had worn these components out. Now I hesitate to buy a replacement chuck. There must be a reason for all the issues seen here with this item. I always hand tighten so now I'm wondering if I'm missing something.
March 24, 2016
Rated 2.0 out of 5.0 by Ray1952 Not a great accessory
In my opinion, making this a 'wrench free' product is a BIG mistake.
I had a cutting disc fly out of the chuck after tightening it by hand. I am not a weak person and tightened it as much as posssible. After tightening with a wrench it was fine and worked OK. I would recommend the product but NOT as 'wrench free'.
February 22, 2016
Rated 5.0 out of 5.0 by BobA Different
I bought this yesterday even though the reviews were mostly negative I think they don't understand how it works. Most chucks are in two pieces. This one relies on the threaded shaft to close the jaws when you screw the in and open them when you unscrew it.
February 16, 2016
Rated 1.0 out of 5.0 by jonecone same problem as others
I bought this a couple months ago and really needed it to speed up my work. It was ok for a very short time, then as I was drilling the grip would loosen up and the bit would fall out (if I was able to slow it down quickly enough and saw that it was loosening--otherwise it would fly out). Then I would try to adjust it and it would seize up. This slowed me down so much. Finally I'd get it off, but it was a huge effort getting a bit back in and tighten it. It was a vicious cycle, so I just gave up. If it had worked, it would have been great, so now I've given up on this "time-saving" device.:(
November 16, 2015