The 937 Series L-handle nut drivers from Beta Tools make quick work of metric (mm) hex-head fasteners, even in hard-to-reach spots.
This wrench has a 22mm deep hex (52mm deep) on the extended leg and a 22mm 12-point socket on the short leg. The opposite side of the short leg is open to allow a stud to poke through when using the 12-point socket. It also allows you to run a bar (not included) through the short end for increased leverage when using the 6-point socket. The textured finish looks great and hides scratches.
Overall length (including deep hex end): 250mm. Short leg length (including 12-point end): 41mm. Sold individually.