Ark does not intrinsically understand any archive format, but instead acts as a frontend to command-line archivers. It can work with many backends, including 7z, tar, rar, zip, gzip, bzip2, lha, zoo, and ar.
Ark can be integrated into Konqueror, through KParts technology, if the appropriate plugin from kdeaddons package is installed. After installing it, files can be added or extracted in/from the archives using Konqueror's context menus.
Support for editing files in archive with external programs. Files can also be deleted from the archive.