Trying to get the screws into the holes and driving them in was extraordinarily challenging due in large part to their magnetic bond. Screws didn't want to leave the driver, once they were in they flew right back out as soon as the driver came within distance. To combat this, I suggest using a thin, clear tape (I used packing tape) cut into 4 strips and place each screw flat side down on one end of each strip of tape. Now you can easily maneuver and securely hold the screws into their holes as the driver pierces the tape easily screwing them in without losing them or your mind. Also, fridge magnets are good to retrieve screws that have fallen into iPhone's nooks and crannies, likewise from carpeting.