As far as I know, the Pentax-brand tubes rely on an aperture set on the lens, so while they'll work with manual-focus K-mount lenses and most of the FA-series, they won't let you work properly with the D-series lenses that don't have an aperture ring. They are "auto" in the sense that they allow you to focus and meter wide-open, then stop the lens down to the set aperture mechanically, but they don't appear to have the contacts necessary for electronic aperture control. (The newer digital-intent lenses are essentially stopped-down to minimum aperture mechanically all of the time, as you would have to do with a lens having an aperture ring if you wanted to use the aperture setting on the camera body.)

Kenko used to make a proper set of automatic tubes for the Pentax that gave full electronic aperture control and screw-drive autofocus, but while they still show up on the used market from time to time, they appear to have been discontinued. There are, of course, any number of off-brand (Chinese) tubes out there claiming to be auto, but they tend not to give away too many secrets in their ads and placements, and I'd suspect they're just K-mount mechanical linkages since I can't see anything that looks like electrical contacts in any of the pictures.