It doesn't fit into the screw. I had a broken iPhone 4 (AT&T) and I bought this so I could see what happened when you took it apart. When I tried to fit the screwdriver into the screw, it just didn't fit. When I looked at them both closer, I realized that the screwdriver was definitely WAY too big. I wouldn't be angry if it was a generic star shaped screwdriver that I just bought one size too big, but it's ADVERTISED as "Star Shaped Screwdriver FOR IPHONE 4." Very disappointed.
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