*Needs a high blacksmithing skill with a high ql door lock.
*Very hard to start and continue.
*Strongest door available has almost double the resistance of a rock mine door.
*20ql lock gives ~6% chance at 70bs, 86ql lock gives ~44% chance at 70bs, steel sheet ql does not seem to affect chance.
*Failure to create destroys the lock and damages the steel sheet.
See also [[Mine door (rock)]] and [[Mine door (wood)]].
[[Category:Babel/M]]