The Headquarters of The Ultimate Tool for Braces Online Store and Fulfillment Center. Dr. Larry Caldwell invented the only reusable "weird shaped orthodontic flosser so kids with braces would actually floss! The Harp is not floss! The braided nylon, each scientifically taut, reusable, durable flosser lasts up to a week. It attacks plaque and reaches 'way back there' with ease to keep kids mouths healthy. The Harp is extremely gentle to the wires yet massages the gum line to keep gingival hyperplasia away and no white spots - all unnecessary problems that effective flossing disrupts. Today, Dental Practice Hygienists are using it to save time chair side, but also providing a tool that people will really use. Nothing compares, guaranteed.