There's your answer as to what kind of hone it is, she said he collected straight's. That hone has the dimensions of a Barber hone. They're wonderful. 3-5 strokes and your blade is refreshed. I collect them, clean them up. They are hard as diamonds. I use a D8XX to start and work my way to 1000 grit. When I get done, they look new.....
Enjoy....Rich