Basically, in the normal wrench GUI, there should be a check box labeled "Toggle Brick Damage"
This would make the brick indestructible in a mini-game (with brick damage on) if it is checked.
If the mini-game has Brick Damage off, and this is checked, then the brick should be destructible.
So basically, it sets the brick to have the opposite of what the mini-game brick damage is set to.
I hope you can figure out how this would be useful....