Immovable Rod

This flat iron rod has a button on one end. You
can use an action to press the button, which causes
the rod to become magically fixed in place. Until
you or another creature uses an action to push the
button again, the rod doesn't move, even if it is
defying gravity. The rod can hold up to 8,000
pounds of weight. More weight causes the rod
to deactivate and fall. A creature can use an action
to make a DC 30 Strength check, moving the
fixed rod up to 10 feet on a success.