Board Thread:Questions and Answers/@comment-5627887-20130526232412

Does anyone know by chance which materials the Iron Drill (and in fact the Hardened Drill and Galgadorian Drill) will drill through, and which they won't? I'm specifically hoping to find a material I can use on the walls of an underground base to deflect incoming drills. (I know a forcefield will do the job but in lieu of setting one up just yet I want a quicker solution). 