Immovable Rod:

While the design of these 2-3' long rods may differ, the function is always the same: by pushing a button or twisting the end of the rod (depending on your rod), the rod becomes locked in place. While locked, the rod defies gravity and can support 8,000 lbs (any more weight on it causes the rod to deactivate and fail immediately). The rod can be moved without deactivating it by using your Action to make a DC 30 STR check to move the rod 10'.

This item does not require attunement.