I bought it because the blade diameter size is 1 mm increments, is it due to core shake? Is it too bad? There is a hole considerably larger than the blade diameter size! I can not say it in a word! Blades got clogged immediately and the worst! I will not buy it again! It is! Shinto Kogyo Co., Ltd. Iron hole soup is the best though there is no size! It is! It is!