These are not magnetic.
Each of the nut drivers included in this set have a different sized diameter full hollow-through shaft to accommodate the rod size that corresponds with the nut driver size.
The model # 635-4 Heavy Duty Nut Driver Set does not include a plastic tray.
The nut drivers included in the Klein Tools Heavy-Duty Nut Driver Set feature 4” shafts. This set is not available in 6” shafts.
No. I ordered it online for store pickup. Took about a week.