Harpoon tip fixed blade design

[Geode]

Hello all.

I have been admiring some of the harpoon tip fixed blades that are sometimes seen. Beyond adjusting the balance of the blade, and looking cool, is there a rationale for this design?

 

[Hankins]

Strength and Penetration great combination for both

 

[ob1korobi]

I like. Been trying to get something similar on all secondaries to meet at the same point. Keep up the good work.