The simple Aleut harpoon consisted of four main parts: the wooden shaft, the bone foreshaft, and the bonehead (tip) with barbs pointed backward. The barbed head was loosely fitted into the socket of the foreshaft so that when the animal was stabbed, it pulled the head away from the rest of the harpoon. The sharp barbs penetrated with ease, but could not be pulled out. The bone tip is fastened to a length of braided twine meanwhile; the hunter held the other end of the twine in his hand.