I was surprised to open it! Obviously the particles are finer than the things of Sankyo Rikaku used to date and those sold at home centers etc. (Usage is small?) So do not go down. About # 220 other manufacturers? The mount is too soft and there is no waist, I am hard to use. Although # 180 was also purchased at the same time, it looks finer than other makers. A word of disappointment.