The Cardboard Upholstery Tack Strip is used in upholstering to hold a crisp, straight line while blind-tacking welt seams in place. It gives a finished look to projects, creating neat and professionally finished edges and welt seams, as well as securing the back outside corners of reupholstered or newly-upholstered furniture. At a standard 1/2 inch width, this tack strip is a valuable addition to any home decor DIY kit.