how do i remove these drums?

could be a nut, i hope not (sorry, couldn't resist)

if it is a nut i need one of them tools to open 50 gallon drums




it does seem to slowly be getting looser

ive been spraying it wth WD40 (don't have the PBandJ blaster)

i just wanted to make sure i don't brake it (again, sorry for the bad pun)