Hi Paul, I bought a chuck from woodcraft just like yours. It works ok with the collets it came with, but upon closer inspection when I got it home, the collets seem to be just a bit off on the size and taper than the more common ER collets that this one resembles. I have not been able to find collets that fit this holder so I can expand on its capability. Now I know why it was such a "good deal", lol. This unit will be going away soon to make room for a holder that takes Ericson (ER) collets. A bit more money, but a much larger selection of collets. The Beall chuck uses ER 32 collets. These look like what we have from the woodcraft special, but will not fit the holder.