UV-resistant, reusable fasteners stay attached when wet or dry. They work on most surfaces that are varnished or sealed, including wood, metal or drywall. Fasteners are also great on bare metal and many plastics. Quick, easy-to-use strips hold up to 5 lb. (2.27kg) (1" per 1 lb.). They last for 1,000 closures. Audible snap indicates closure. Use great for hanging birdhouses, securing outdoor cushions and tablecloths or hanging thermometers and clocks.