Swiffer Dusters Super Extender Handle Starter Kit extends up to 6 feet allowing you to reach more areas of your home, especially hard to reach places. Trap + Lock up to 3x more dust & allergens. Duster offers 360 degrees of specially coated fibers that grab onto dust & do not let go. They are uniquely designed to Trap + Lock dust from every direction. The unique swivel head pivots and locks into four different positions. vs. feather duster, common inanimate allergens from cat and dog dander & dust mite matter. Swiffer Super Extender Handle Starter Kit comes with 4 Heavy Duty Duster Refills.