On Jun 9, 9:16*am, Randy wrote:
...
...The problem I've found with the cheap
ones is they are all undersize, you have to force a 1/2" rod into a
1/2" collet. *With the Lyndex brand it will just slip in *and hold
nicely.
.....
Randy

It may not actually be undersized. See if the slits warped shut in
hardening. You can jam screwdrivers in to open them when you load or
remove the stock.

jsw