Yeah flat heads are terrible. They are always the reason if I get injured by my screwdriver.
Firstly, theres no geometry preventing the bit from slipping out. Secondly, greatly exacerbating the first, you need to press hard to prevent the bit from camming out, which increases the risk of it slipping out.
Both problems combined causes the bit to slip out with very high force. If you happen to be holding the workpiece, you can injure yourself real bad.
I fucking hate flatheads.




nom
:3