From the preview:
Well well well, the long awaited Steel Miners are here! When we unlocked the stretch goal and reveal that Steel Miners will be done, a lot of you guys & gals asked if they would have drills for weapons. Now, first brainstorm we had resulted in epic "drillness" and we decided to keep this theme for whole unit! No mattocks, no pickaxes, only drills. And let's face it, the bigger drill, the better!