Cheap soft pot-metal screws.

Comes with worthless cheap screws.

2) screws are terrible

No screws inside, both pieces were severly twisted

because I was extra careful when I put the cheap screws into my pedaltrain

The crappy screws are the least of the problems with this

If I had a job to make the sorriest screws in the world, I couldn't make them this bad if I tried.

I can hardly convey how cheap and weak these screws are.

I bought some inexpensive $0.20 screws at my local hardware store and mounted the power supply without any other issues.

I used a screwdriver and actually had little problem getting them screwed in that way.

Cheap soft pot-metal screws.