I used a hole in aluminum (2017) and used for deburring, but it scallops and the scraping surface was rattling, it did not become usable. Because it is rarely corresponded to iron and stain, is it okay with that? Is it? When I asked the professional in processing, it seems that Yamawah or Okazaki Seiko is good for cutter system. I plan to replace it with Yamawah.