I first offered these on the FB page for the Cue Smith Lathes (of which, I am a proud owner). It started as a project to learn how to draw in Fusion 360°, and once a few guys posted their feedback, I was inundated with requests.
Each collet has the size clearly labeled on the bottom of the brim for easy and quick identification.
The feedback has been very pleased with the accuracy and overall feel. Including one buyer who said "best collets on the market, bar none".
They are made with a photopolymer resin.
Full set is 10mm through 14mm in .25mm increments (17 pieces).
$45 for the set of 17 with shipping to the lower 48. No international without a prior discussion.