Inside the case are 6 bit tips; (#1, 2, 3 Phillips and #4, 6, 8 slotted) and a 2-3/8" (60 mm) long magnetic shaft. Simply open the case, remove the mag shaft and the desired bit tip. Then, close the case and insert the mag shaft into the hole at the end of the case. With the case acting as a handle, you now have a 6-n-1 screwdriver.