I ordered mistakenly to buy set items. When compared with the set items and the specifications, the file file is long and the working efficiency is high. Correct answer by mistake. Files that are sold for modeling work are limited to fine and require finishing with waterproof paper, but this does not feel the necessity. (If the finishing is finer finish, the compound comes in.) Also, the shaving residue accumulates and the sharpness gets worse immediately, but this can be scraped well even if it accumulates. Of course it is useful to use metals such as etched parts though.