If you are trying to do electronic repair such as cell phones, cameras,
laptops you are going to need a special tool set.
Almost every piece of electronic equipment uses Torx screws. Each piece
of equipment can use two or three different Torx screw sizes, so you
will need a tool set with multiple sizes.
The best buy could be getting a Torx screwdriver with interchangeable
bits or tips. These usually come with a range of Torx bit sizes that
should fit all of the Torx screw sizes that you will run into. These,
as with all tools, come in different qualities. Don’t go to the
cheapest sets as these will not hold up if you are doing all a lot of
assembly work.