Takes the form of a black, double-headed drill tank. It forms the lower legs of GaoGaiGar and Star GaoGaiGar. Its dual cockpits are on top of the unit, one behind each drill. The drill is capable of separating into two units—one for each drill—and recombining afterward. It is also capable of limited flight, in addition to traveling along the ground and tunneling through it. DrillGao can further separate and fit over GaiGar's arms, giving it a form of attack subtly stronger than that of its Claw Arm.