This set is really high-quality manufactured than the very cheap kits. I only needed the set to switch a screwed band at my clock. That has worked very well and the screws were not spoiled.
From Photo forth the screws turning look like, as if they were made of aluminum, but The handles are made entirely of plastic and only the front tips are made of metal. But that's not so bad.
For the money a good set. Cheaper I would not buy.