Drum pallets are specifically designed to handle either two or four fifty-five gallon drums.
Typically these pallets have a circular recessed groove that accepts the lip of the drum.
This groove holds the drum securely during transport.
You can also purchase stackable drum pallets. The center image below contains a stackable drum pallet.
Stackable drum pallets have a recessed groove on both the top and bottom to allow
you to stack drums safely and to transport them easily after you stack them.