The War Hammer was perhaps the ideal weapon for use against a knight encased in plate steel! The heavy hammer head could crush the strongest suit of plate with just a few blows, and the back spike could open that armor like a can opener! 
 
Blade length: N/A
Overall length: 30.00 in
Blade material: Carbon steel
Handle material: Hickory wood
Sheath sold separately
Weight: 35.30 oz
Blade finish: Black