Just Some Intel On these Stones..I Have an Escher Thuri..They are Said to be Around the 15/16 K Finishing Capacity Mark..Mine is Around 16 K..They have a Lower Grit Capacity of 8 K..So they will Pick Up an 8 K Edge & Take it through to Around 16 K..
They are Idiot Proof & as Consistent as Any Modern Synthetic Hone..These are One of the Finest Stones Ever Made in My Experience..They Put a Buttery Smooth & Sharp Edge on Any SR..They are a Treasure..
@Luckypip thanks! @Fergiebilly thanks for your comment. yes you are right. these stones are finishers and one of the best ever made. you can produce a very fine slick on the stone.