Libraton 8PCS Magnetic Nut Driver Set, Long Nut Drivers 6INCH, Metric Nut Drivers for Impact Drill, Long Shank Nut Driver Bits, 1/4"Hex Shank, Long Power Bits, with Storage Bag (7-14mm) : Amazon.co.uk:
11mm Bi Hex Socket Drivers/Holders / tek screw bit