Viking era fish spear and fish hook - 10th Century

This style of fish spear and hook were found in Denmark at the base of a waterfall. Dated to around 900 A.D. To use the spear, you bind your heavy line around the shaft above the socket. Then jamb the head onto your wood shaft. When you spear a salmon, the wood shaft pulls away, and you "play" the fish with your heavy line attached to that spear head.