Drywall Screw Setter Bit Tip, with internal clutch.
The small ones don't have a clutch, so they just make the driver cam out of the screw. These do, so the driver just stops turning when correct depth is reached.
Pros: pretty accurate, and doesn't wear the Phillips tip because it doesn't cam out. This is nice, because a pristine Phillips tip really helps doing a clean job. Especially with steel studs, a worn tip doesn't hold the screw that well so it sometimes goes sideways and shreds the drywall.
Cons: you need a screwdriver in your pocket as an accessory in case you want to unscrew or adjust a screw...
Also check that the clutch tip has a magnet in it to hold the screw.