Depending on where you sourced this file, the "K2870" designation usually refers to one of the following:

If you are having trouble opening the file, ensure you have downloaded of the archive. You can then use the 7-Zip File Manager to right-click part .001 and select "Extract Here."

, reviewers from Beyond Tools highlight its construction and mirror-polished finish for corrosion protection. It is highly rated for meeting international standards like DIN 3120.