The "Dragon Drones" also drop thermite [0], a material with massively exothermic high temperature 2000°C+ redox reaction, which can melt through most metals. Thermite is often used to weld rail tracks [1].

[0] https://en.wikipedia.org/wiki/Thermite

[1] https://www.youtube.com/watch?v=XttJet5WkTk