Rolls Razor stone

Any experts out there that can tell me the grit and usefulness of a Rolls razor honing stone.I know it didn't hone my Rolls but is it any good for a straight?

Given the numerous other choices available I wouldn't bother with it. That's not to say if you already had one and a junk razor that you shouldn't try it out, but I wouldn't source one for straights ad hoc.

Thanks.I do have one of these hones but when I looked it out I found it had shattered.It is now in the garbage.So problem solved.Thanks.