Apple is beginning to use specialized screws to seal the outside case of the iPhone 4, according to a new report. Arguing that the move represents an effort by Apple to keep users from being able to repair their own phones, iFixIt reports that Apple is using a new five-point “Pentalobe” screw, for which there are no readily available screwdrivers. According to the report, Apple has used three different sizes of the screw, first using it to secure the battery of the mid-2009 MacBook Pro, then using an extremely small variant on some iPhone 4 units, and employing yet another size to lock users out of the new MacBook Air. In addition, the report claims that should a user bring in for repair an iPhone 4 with standard Phillips screws on the exterior, Apple will replace them with the new, tamper-resistant Pentalobe screws without notifying the customer of the change. As a remedy, iFixIt is offering a $10 “iPhone 4 Liberation Kit,” which includes a five-point screwdriver—good for removing the Pentalobe screws but not recommended for repeated use—along with two Phillips replacement screws and a #00 Phillips screwdriver for future servicing.