Beta Tools #96BPA Offset Hex Key Wrench has an extra-short end which is angled at 110o to provide access where traditional 90o angled wrenches cannot reach. The short end is very shallow to allow it to reach tight spaces.
The long end has a ball-end hex which allows you to turn fasteners at an angle up to 30o.
The #96BPA comes in 9 metric sizes: 1.5, 2, 2.5, 3, 4, 5, 6, 8 and 10mm