This is The MilkenKnights Onshape-based CAD Library. It was created based on a combination of many CAD libraries already existing, the Kit of parts, and commonly used COTS parts.
To use the library:
- Sign in
- Copy the file into your Onshape account
- Save it into your Onshape account and use the browse documents part of the “Insert” tool to import the COTS library parts into your file