keyed deadbolt

There's two holes on the inside with a rotating plate inside that blocks access to the screws when the bolt is set.

Unlock the door and the screws should be exposed. Or drill through the plate.

What brand? I can think of three or four, and they are all different design.

Lori, Arrow, Moss/ and the other Taiwans. Adams Rite.

Locksmithing business for 18 years. Seen a lot.

That works for one brand, and not for several others.

If cost isn't a concern and you're starting from scratch (making new holes in a new door), what brand & model series deadbolt do you feel is the most resistant to vandalism? I'm buying a house shortly and will be replacing a couple of doors which are made of "crapwood". You probably know what I mean.

this may be like a commercial lock and have a hole in the bottom near the door to release the cover and get access to the screws. Chip

I'm not sure any is more or less vandal proof. Schlage quality has gone down a LOT in the last 20 years. They have a new design I don't like.

Arrow are good. Dexter, I've not used in years.

Most of my customers like Kwikset, or Titan. They have economy, good, and overkill grades of each.