great item

Great buy, it is not 100% true as others have stated, but it gets the job done. I recommend buying the collet nut set for more precision work, its only $15 to get them both, and it is great to have when you need it. This should be included with every dremel sold. Fits the Dremel 300 series with no problems. The chuck adds a little extra length, so working in small areas may require the use of the collet nut set.