From LEGO Batman Wiki
|User||Batman and Batgirl|
|Powers and Abilities||Can lay down Bombs and detonate them to destroy practically anything.|
The Demolition Suit is a suit only for Batman and Batgirl. It is unlocked after you finish You Can Bank on Batman. The suit allows Batman to plant 3 Bomb Canisters next to shiny, silver objects & press the detonation button.
It can be upgraded to act like armor plating and it can also be upgraded to lay 6 bombs instead of 3.