Novice here. I'm trying to install a swing arm lamp in the corner of two walls, one of which is an exterior wall. The magnetic stud finder I have indicated that there's a stud on the interior side of corner only.
The two screws (and anchors) that came with the lamp are 1.5" long and 1/4" in diameter. When I drilled into the wall, though, I made it 0.5" into the wall before the drill stopped. I can't see anything beyond the drywall.
I'm wondering if it's a protective plate (although there aren't really and outlets nearby or if I just have metal studs (it is a new apartment building). Is there anyway to tell?