To use the Drill Mod 3, it needs to be attached to one of the three slots on the Terrain Tool. Use the tool as normal to dig through soil. The use of the drill mod requires power, and it will drain the backpack supply quickly. For longer use connect to tethers or have power generating items in the backpack, such as Small Wind Turbine, Small Generator or a QT-RTG.
Notes
This drill mod can dig up the terrain around shelters, so caution is suggested to players when digging near their bases.