Makes flossing back teeth super easyand tips can be swapped with Piksters Interdental brushes, these refill heads are to be used with SupaGRIP MAX, the palm grip handle gives better feel and enhanced control. The large comfortable grip requires less pressure and is firm, responsive with a high-quality feel. Great for seniors and those with arthritis or low manual dexterity. Strong and durable floss with a Reusable handle. SupaGrip Max Refill Heads - 28 pack