Do it Silver Fluted 1-3/8 In. x 3 Ft. Carpet Clamdown with Teeth

Designed to fasten and finish the edge of cloth or jute-backed carpet. Made from extruded aluminum. Screw nails included. Carpet metal installation on concrete surface suggestion: Drill a hole in the concrete, insert a 3/16″ x 1-3/8″ or 1/4″ x 1-3/8″ wood dowel. Use the screw nails provided with carpet metals, insert into dowel, expanding the dowel to lock in place.