The Tenderizer (Fallout 3)

This special Sledgehammer, The Tenderizer, is located in Anchorage Memorial in the storage room with the broken door. The door can be fixed by finding the door component, but note that you need a lockpick level of 50 to be able to open the safe in which the door component is stored in the top level of the building. A repair skill of 35 or higher is required to fix the door.