First solution, difficult to screw into drywall. I thought I might have screwed in a bolt, so I pre-drilled a small hole and couldn't find the bolt. Second problem, one day finally managed to get into the drywall, broke 2 dowels and just screwed them in by hand. (Finally I tried drilling at low speed thinking maybe I'm just not strong enough to go through the drywall and in fact I broke another one. And made a big hole/mess in my drywall , which I had to patch.) I actually gave them those few opportunities to work and they just don't.