Sometimes it is a pain with the iPhones having a number of small screws of a different size and length.
Easily they get lost or mixed up.
iScrews can help you. It has a layout with a printed iPhone on top and holes to put in the screws at the right position. So you always remember the position of each screw and it prevents of mixing or losing them.
iScrews, the clever solution!
Available in versions for iPhone 3G, 3GS, iPhone 4, 4S and iPhone 5, 5S, 5C.