Besides the price, cutting power is amazingly powerful. It will overcome the expensive whetstone. Hardness is better than spec and control of tooth tip is easy. I am very saved for a single delivery date product. But there are disadvantages. I think it can not be helped because of the characteristics of the whetstone, but it decreases faster. Compared to the same price range product (cutting power is inferior), I feel that it will be reduced by nearly 30%. I have purchased about 45 so far, but it is my favorite because it is pleasantly cut.
I feel cutting ability is high as a product in this price range. Because it is a rough side it is hard to glow red even with such thick objects. Not limited to this, products in small packaging should be used for experiments.