Bunkermod Unbreakable Blocks Mod 1.8, 1.7.10, 1.7.2 adds various blocks and equipment resistant to explosions and unbreakable for normal items – you have to use the armoured hammer. Of course it is possible to configure it, you can make that every item would be able to harvest blocks from mod, there is a possibility of turning off the resistance to explosions. It adds also some extra stuff (module) like hidden doors and buttons (more in the future).