Purchased the screwdriver to repair a broken back cover on an iPhone 4.
Fixing the iPhone was very easy and quick. Unfortunately, the screwdriver had to be modified prior to use. The tip of the screwdriver was too long and came to too fine of a point to grip the screw.
Very, and I mean VERY, gently grind or file off a small amount of the excess tip. I'd suggest grinding a little and testing the fit and then grinding some more if needed. Be sure to keep the tip square to the grinder.