This is a spear aiming stand, used to help aim when doing a spear thrust. To make it get a two gallon bucket, fill with cement, put a pvc pipe in first, so the pvc pipe will not fill in. Make sure the pvc pipe is higher than the cement, but only by about 3 inches. Then put a broom pole in the pvc pipe when the cement is dry, atach a duck tape circle on top of it. This makes for a great aiming circle for a spear. Also when not in use just pull the pole out of the pvc pipe. You also can add more tape circles for different hights.