This is the 5/8" wide (lower image in picture) that is made from M2 HSS but has undergone the treatment of cryogenics--extreme cold applied between tempers. This gives a more uniform structure of the steel, tougher and longer edge holding properties.
Posted by Kelly J Handwerk on 11th Jan 2017
Best turning tool i ever had!
Posted by Ed Zappen on 4th Dec 2015
Amazing!! I paid the extra $7 for Alan's sharpening. Amazing!! Right out of the box it was scary sharp and so easy to use.. I rounded a piece with no issues whatsoever..I smoothed it, cut a couple of beads, trued up an end, very easy to manage with that rounded tip and hefty shaft. Just love it. Maybe a little pricey but worth every penny. Can't wait to get the larger one also. It will be the most used tool in my tool rack. I highly recommend it.