National hardware wood joiner, series: V7722, no 0, steel, zinc plated, for use to strength then wood joints. 8 pack of 3/8 inch by 1 inch joint fasteners. Prongs draw both sides of the joint together without cutting or splitting wood fibers. Used for making or strengthening any type of wood joint. Used for making or strengthening any type of wood joint. The prongs draw both sides of the joint firmly together without cutting or splitting wood fibers.