I am very pleased with this eraser. It is perfect for making those little corrections, such as changing the sign of a number, without having to re-write the whole, or most of, the equation. (I do like to make little mistakes.) I do keep a larger eraser for those mistakes that take up a larger surface area. This little gem is perfect for the smaller errors or more precise erasing.
Seed Co., Ltd. was founded in 1915 in Osaka, Japan. The company primarily makes erasers, correction tapes, etc.