I just got one ... so far very impressed with the design of this thing.
http://yhoo.it/1uBb9WjIt is a realtively small lightweight tomahawk which can function both as a survival tool and a personal defense weapon. It's about 14-inches long, and reasonable lightweight (1-1/2 pounds). It feels good in the hand, and is not clumsy or bulky.
If you do get one, be aware that the spike on the reverse side of the head can impact your own body during a backswing with the tool. So be careful! they also have a different design variation that has a hammer instead of a spike.
talk to me if you are considering the purchase.
cheers,
Pete