Board Thread:Speculation House/@comment-107.15.104.101-20130725061023/@comment-154.20.172.168-20130918130246

Just nothing this but i think the "Big" two handed weapons are used to take out larger grimm.

Note that both nora and ruby dealt the big "Finishing blow" to the grimm. This likely implies the larger weapons are the only ones capable of mustering the sheer force needed to taking out those larger grim.