50 count, 3/16" x 1/4", medium aluminum rivet industrial pack, 3/16" diameter, 1/4" grip max, produces a strong, permanent, tamper proof joint quickly & easily, rivet will not strip out or vibrate loose like threaded fasteners, for joining sheet metal, aluminum, fabrics, plastics, & leather, use on metal cabinets, aluminum doors, & windows, metal fixtures, automobiles, heating ducts, gutters, & downspouts.