My PH came with a very steep 30 or 40 degree angle. I get the feeling that this is done by hand and is kind of random.
Of course, now I've got it down to a 20 and 25 degree dual angle on my Lansky. I tried just using the 25 degree angle for a while, but it was too hard to get a sharp edge with such a large surface area between the blade and stones. Now I can almost shave with it. . . if I just had a nice leather strop to finish the job. . . Hmmmm
-Latebound