Snap Grommets 3/8" Inside diameter (24 per package) For fastening shade cloth where a grommet application is necessary. Space every 12 inches and in from the edge 1 ¾" to the center of the grommet. 1. Punch or cut a 3/8" diameter hole in the solid area of the fabric. 2. Press fabric over the male side of the grommet. 3. Press female side (raised side up) onto the male half, now in fabric, until both parts snap together. (tap lightly with a mallet if necessary.) -Strong and durable -will not rust or corrode