In late 2010, Apple switched the screw style on the iPhone, MacBook Air, and MacBook Pro from a standard Phillips screwdriver to a 5 point star screwdriver size TS1. Before selecting this screwdriver for purchase, all customers should look at the bottom of their iPhone 4 and see if it has a "plus" or a "star" screw. These will be the screws on either side of the Apple connector. 100% of these screws are tested on authentic iPhone 4 screws. However, due to the extremely small dimensions involved, we ask that you contact your authorized distributor regarding any screwdriver that does not fit correctly.
