Series 395 HO (Hollow shaft):
5, 5.5, 6, 7, 8, 10, 13 x 90 mm
Wera's - Nut-driver with a Hollow-shaft is needed whenever there are screw-driving jobs involving threaded rods i.e. the threaded rod through the nut can slip into the hollow shaft of the Nut-driver (Nut-setter).