I got mine from sears, seems to be a 600 grit coating over a solid steel rod (quite heavy). Handle is their clear and red screwdriver type handle, and carries their forever guarantee. I figured since diamond hones "do" eventually wear out (I've seen one dmt coarse stone on display at a local sporting goods store worn to the point where it was totally devoid of cutting diamonds) that I'll be covered, in any event, it's only 20 dollars from Sears so I won't be out too many bucks if they dont. Just to clarify though, I doubt I'll be wearing it out anytime in the next 10 years, I'm not using it to rough hone anything, and I haven't worn any of my diamond stones out yet, some of which are over 10 years old.
