iFixit Minnow Precision Bit Set, Pocket-Sized Portable bit Set with 16 Mini-bits (4 mm) & Precision Screwdriver for Repairing Electronics Like iPhone : Amazon.co.uk: DIY & Tools
Electric Precision Screwdriver - Mini, Cordless, for Electronics
Standard Screwdriver Set: PH000-PH1, 2.5mm Marlin Screwdrivers