Sling is one of the most ancient weapons. It was probably the first weapon designed to hurl a stone with more force than a person could deliver with the hand and arm. In its oldest form, the sling is a leather or hide strap, with a string fastened to each end. A stone or other object is placed on the strap, and the operator holds the two cords. The operator whirls the sling above the head and then lets go of one end of the sling's cord to hurl the stone.