Reviewer: Brian from Mackay, Qld Australia 01/14/2012 These do have a nice assortment of Diamond Reamers & the collet chuck handle is a nice handy size. The handle allows the longer thin reamers to be housed in reverse to protect them in storage.
I found that some had the chuckinsert slightly out of square to the handle which is a nuisance.
I also found that the Dremel Collets fit this handle perfectly iff you wish to use it for different diameter tools. I'm keeping one in my Dremel kit for that reason.