|“||All workers need a mallet, just watch out when they use it!||”|
|— In-game description|
The Mallet is one of the three required tools for hiring extra workers. Destroy a Star Base for a 20% Chance to get one or you could alternitively buy it for 80.
Some time ago there was a glitch showing the price as 40 galaxy chips, however this should now be resloved...