I have a gauge set similar to the Hosford, but I think mine is the 100 Straight set as sold by Brownell's. Mine is in a fitted wood case and, as I recall, included setting rings for .410 through 10 gauge, including 28 and 16. Took a while, but I found mine on eBay at a very good price. I think the list when I found mine years ago was about $550. Whatever mine is, it is the same as the set my choke and barrel guy uses.

https://www.brownells.com/gunsmith-tools...t-prod6808.aspx