Super sledge

Fallout and Fallout 2
A Super Sledgehammer, manufactured by the Brotherhood of Steel, using the finest weapon technology available. Includes a kinetic energy storage device to increase knockback. Min ST: 5.

Fallout 3
Super Sledgehammers are large melee weapons in Fallout 3. They benefit from the Melee Damage Bonus provided by Strength.

The friendly Super Mutant Fawkes carries a unique Super Sledgehammer, Fawkes' Super Sledge.

Locations
Super Sledgehammers may be found on random Super Mutants, and members of the Outcasts and the Brotherhood of Steel.