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 Plus Lock up to 3x more dust and allergens. Duster offers 360 degrees of specially coated fibers that grab onto dust and do not let go. They are uniquely designed to Trap Plus 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 and dust mite matter. Swiffer Super Extender Handle Starter Kit comes with 4 Heavy Duty Duster Refills.