This is a 4-bit pocket magnetic screwdriver for use in repairing iPhone 7 and above phones. We purchased a complete replacement screen (with tools) for repairing our granddaughter's iPhone 7. Unfortunately, the tools supplied with the replacement screen were not proper for the job to be performed (cheap screwdrivers). We ordered this screwdriver kit, which assisted us in performing our repair. It is very good quality and comes with the tips needed to replace the iPhone 7 screen. The bits (as well as the cap) are magnetic, which helps you from losing those tiny screws (believe me, we have lost them before with other phones).