The Remote Drone's drill functions similarly to the Laser Drill. It has a limited range, and can drill through the same breakable blocks, and damage the armored enemies the Laser Drill can. The drone can project it in all 8 directions.
It looks like a bunch of small red glowing vertical beams bunched together starting small, widening to taller than the Drone then fading.
Location & Prerequisites
It is part of the Remote Drone upgrade.