In article ,
neill wrote:

am i missing something or did oneway do a lousy job planning the sizes of
their jaws.
#2 jaws will grab a tennon from 1 3/4"-3 1/4".
#3 jaws will grab a tennon from 3 7/8"-5 1/4".
so anything larger than 3 1/4" but smaller than 3 7/8" is not covered.
now they have the new #4 jaws.
#4 jaws will grab a tennon from 4 1/4"-5 3/4".

Hi Neill, after all of this I think you should chuck the Oneways and
look into the Vicmarcs. But then again, I might be a little biased.