The hammer is slotted for two handed and needs to be changed to one hand. I did some research and found screenshots and listings of it on as a one hander. Here is the easiest and probably most reliable evidence.
http://camelot.allakhazam.com/item.html?citem=6812
Realm: Midgard
Slot: Right Hand
Shrouded Isle expansion Required
Has a Particle Effect
Weapon Skill: Hammer
Requires Class: Skald, Thane, Warrior
Damage Type: Crush
DPS: 16.50
Delay: 4.60
Magical Bonuses:
Hammer: +6 pts
Stormcalling: +3 pts
Strength: 15 pts
Energy Resist: 6%
Magical Ability:
Function: Direct Damage
Damage: 71.00
Target: Point-Blank Area
Range: 350
Cast Time: instant
Damage Type: Heat
Damage Modifiers:
Base DPS: 16.50
Quality: 100%
Condition: 100%
Starting Condition: 100%
Starting Duration: 100%
Default Bonus: 35%
Quality: 100%
Weight: 4.90 lbs
Utility: 67.00
Bonus Level: 40
http://camelot.allakhazam.com/item.html?citem=6812
Realm: Midgard
Slot: Right Hand
Shrouded Isle expansion Required
Has a Particle Effect
Weapon Skill: Hammer
Requires Class: Skald, Thane, Warrior
Damage Type: Crush
DPS: 16.50
Delay: 4.60
Magical Bonuses:
Hammer: +6 pts
Stormcalling: +3 pts
Strength: 15 pts
Energy Resist: 6%
Magical Ability:
Function: Direct Damage
Damage: 71.00
Target: Point-Blank Area
Range: 350
Cast Time: instant
Damage Type: Heat
Damage Modifiers:
Base DPS: 16.50
Quality: 100%
Condition: 100%
Starting Condition: 100%
Starting Duration: 100%
Default Bonus: 35%
Quality: 100%
Weight: 4.90 lbs
Utility: 67.00
Bonus Level: 40
