This model is designed to hold 10 Ruixin-style sharpening stones. This holds up to 10 diamond stones for the Ruixin Sharpening System. These stones are the ones that come with a plastic backing. The raw whetstones that come with the sharpening kit will fit as well, but more loosely. This case will fit 10 stones for any of these types of sharpeners (Edge Pro, etc). The stones are the 1"x6" size. You can see in the pics that I also have 1 Gritomatic strop bar in there as well, which fits great.