Michael,
It is a stiddy, steady, cutler's anvil.
From the pictures and talking with David Curtiss who is making these little jewels, if you do folders, especially slipjoints, these just might be "the cat's meow" to meet your needs. I have been using a number of thing to do the pins on my slippies...bench block, 1-2-3 block in a vise, other surfaces.
I can't suggest you need something like this ( I can't tell you that my "Better Half" thnks I need one or more of these...she is very tolerant of my indulegences), that appears to be a really fine tool on your knifemakers bench.
I fully expect that for the price, and based on the "consultants" who had input, and after talking with David, if you feel better using Starrett tools, or Snap-On, then one of these things might just be in the same category.
I am betting the cost of a couple that they will be.....