Let me start off by saying that I am very particular about my knives and how they are sharpened. I have spent a boat load of money on knives and I don't own a dull one. This is an excellent whet rock and as long as you know what you're doing, I truly believe that you will not have an issue with this product. The stone itself is made of some sort of synthetic material but does just as well as any of my natural stones that are 2 to 3 times as expensive. The top becomes the base to give you extra room to hold so you can safely push or pull your blade on the surface and greatly reduces the chance of an accidental cut. I wouldn't recommend this to someone that is just starting to sharpen their blades because there is a chance of scarring up the surface if you don't properly hold the blade at the correct angle. It's at an intermediate and higher level, in my opinion. It's a must buy stocking stuffer for the hunter, fisherman, or just the outdoorsy type or for yourself!!