Pipes of the controlled residential ventilation system in drywall

There are basically 2 types of "anchors" for drywall. The small ones (no idea what exactly they're called) that you simply drill in with the cordless screwdriver and then put the spax screws in (I think they hold up to 20kg per anchor) and then the big ones that you squeeze with pliers (for higher loads).

Best regards
Markus