If your heavy-duty auger encounters small rocks, it’s designed to churn them up and push them out of the hole with the rest of the soil. If the rock is too large, the force will likely stop the drill, thanks to the cordless drill’s clutch that disengages the motor if too much torque is applied. Should you hit a rock that causes your drill to stop, simply pause, remove the auger from the hole, and try to manually remove the rock. If it won’t budge, you might need to change your drilling spot.