nice one, i've heard them called 'sword breakers'. could also be called a bar mace. doubt it would be surviveable if thrust into an armoured enemy's eye,mouth, throat, etc. and the impact against armour, especially appendages, would not do him any good either. may not break a sword unless the sword were improperly heat treated, but could give it a nasty bend.
'cold steel' makes a modern version, and a poly trainer version too.
Link to CS video