Robust Comfort Rests earned their name because your hand fits comfortably in the radius of the rest, whether you use an overhand or underhand grip.
You can drop the handle of your tools at a angle greater than 45 degrees for shear scraping and skew cutting action.
4, 6, 9, 12 and 15 inch widths are available in sizes to fit most 16-25 inch lathes.
Comfort Rests come with a 1 inch diameter tool post. 1-1/8 inch, 1-1/4 inch and 30mm diameter posts are available on special order.
I bought this rest because I love my bigger one so much. If you haven't used the Robust rests, you owe to yourself to try them. Worth every penny.