It is a warhammer obtained at the Ironfist Stronghold after completing the quest at Mount Galadrym.
Under its standalone description:
- STR+6, Electrical 10/-, Charge: 15+1d15 hits, Alchemical Silver; Dwarf, Martial, Warhammer
Full suit (with the Belt and the Gauntlet):
- STR+6, Electrical 10/-, Electrical+1d8, DC20 Knockdown 5%/9 seconds, Self: Bolt of Lightning Electrical Dmg 8d6, DC25 Stun 9 seconds, Deafen 3 rounds, Alchemical Silver