I'll admit that my knowledge of tomahawks is pretty limited. I know that the head is held in place by friction, but with mine it doesn't seem to be holding. Whether I use it lightly, or hard, the head of my pipe hawk always manages to work loose, requiring me to stop and pound it back into place, only for it to happen again after another few strikes. I did my best to sand the shaft for a good fit, but it doesn't seem to be all that great in my experience. Is this supposed to happen? Or is mine just poorly fitted?