Rusty shovel

The equips the the  slot and is used when digging gravesites, when clearing bushes and debris, or when harvesting river sand and clay. The can be found in the graveyard trunk at the start of the game or can be purchased from the Blacksmith.

Efficiency represents how much progress toward an operation each use of the shovel provides. The provides the base 100% efficiency.

Energy usage represents how much energy each operation consumes. The requires  per swing.

Studying at the Study table will give you.