Pickaxe I

The equips to the  slot and is used when mining. The can be forged at the wooden anvil or better and can be optionally purchased from the Blacksmith.

Efficiency represents how much progress toward an operation each swing of the provides. A 100% efficiency would cause something to progress at the normal rate while 200% would mean it progressed at twice that rate. The has an efficiency of 200%.

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

Studying at the Study table will give you.