Hog Rings, made of 12 gauge galvanized steel "C" shaped fastener. Rings fit neatly into grommets provided on fence screens. Attaches screen to fence and crimp close with hog ring pliers, ensures a long lasting installation. Once installed you will never need to touch the screen again. (1) quantity of rings = 50' section of fence screening. Hog ring pliers (sold seperately) required for installation of rings. Hog rings are available in standard galvainized gray, vinyl coated black and vinyl coated green color.