Until now, the world's understanding of the Thunderbolt Drill has remained at this level, and it wasn't called the Thunderbolt Drill but the Armor-Breaking Drill!
The name was later changed to Thunderbolt Drill because someone discovered that the drill was imbued with a powerful Thunderbolt Force. Although the amount was extremely weak, it could be charged with the natural thunderbolts, and once it was fully charged, it could unleash an attack accompanied by the Thunderbolt Force.
