In my previous post I said " I think its majic chef" well its not, after reading the last few post it is the Chef's Choice that is sold at Costco..It has 2 small sharpening grinders, one is made of some kind of stone and the other is a diamond impregnated stone. The guides are magnetic and hold the knife at the right angle making it pretty much fool proof. I believe it cost $69.00...

Good luck, Jerry
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It's the very things we think we know

That keep us from learning what we should know.