The price per piece is cheap, but only that. The durability of the mount is low, and adhesion of abrasive grains is weak so that it can not be used immediately. The larger the abrasive grain, the more abrasive grains fall off. A fine one can not be used.
It is a sandpaper that you can use with normal as it is used before. I think there are many other things, but I think that it is best to work with the feel of my hands on the surface polishing of three-dimensional objects.
I noticed it after purchasing but the paper thickness is too thin. If it is poor in durability or if you brush iron flange etc, or if you use it against the iron part in the state of being hit with kerosene it will be torn soon. Although polishing can polish, the number of sheets will be increased. I hope it will make the paper thicker a little more.