Fiber fingers trap and hold dust and dirt. Made with specially coated fibers that grip dust and won't come loose. They are exclusively designed to trap and block dust from even the tightest spaces in your home or office. Ideal for dusting electronics, furniture, knick-knacks in your home or office, blinds, ceiling fans, and even the inside of your car. For use with Swiffer Duster handle (sold separately). 10 replacement dusters per box, 4 boxes per carton.