Heck yeah it is!
Also I got so many stones... and my 6k king is about half gone. Though I like the stone for knives, and would probably buy it again just to have it, I would not cry if it got ruined. King Stones are such a good value! I want to try their 8k gold stone, but that thing is like 86 bucks as opposed to the 34 dollars I spent on this 6 s-3