The description and pictures and title are inconsistent. This allindustrial listing has been criticized before... The set is good, but there has to be a missing value. There are 28 possible by 1/32 value collets between 1/8" and 1". So I think that rules out being by 1/32nds. Or 14 possible 1/16 value collets between 1/8 and 1". My bet, it is by 1/16" values with one missing. It is a good price for Techniks. The webpage is poorly done.That's what I was wondering, lower on the page it states by 1/16ths, so I don't know.
Yes, there are a few sizes that are uncommon. 9/32, 15/32, 19/32, 23/32 and 29/32 are hard to find. Curious to know why.
That set is one of the more complete sets. 1/8-1" by 1/32" would have 28 collets. So there are 5 missing values from that set. That is pretty good, I guess.
This set has nearly all the sizes you asked about….