If you only have the .002 file, it is essentially useless until you find the rest of the parts.
To see what is inside or use its features, you generally need: xmas20.7z.002
Are you trying to this specific bundle, or did you find it as part of a software package ? If you only have the
: You always start the extraction process by opening the .001 file. Common Context for this File xmas20.7z.002