Actually what you see there is blue MC.

For the voice / data we owned a box and 3/4" raceway from the ceiling to the box.

Another contractor had the contract to provide and install the cable and jacks.

We use manual stud punches if the studs are not to thick.

[Linked Image from lashen.com]

We also have battery operated stud punches for thick studs, last resort is a hole saw.

[Linked Image from news.thomasnet.com]

Genrally we punch around 1.25"

These walls are now filled with sound insulation so we did not bother with anti rattle clips in the holes.

[Linked Image from erico.com]

Bob Badger
Construction & Maintenance Electrician
Massachusetts