The one dentists use most.FlosserJ & JUse: Move floss up and down against each tooth. Clean below gum line. Rinse floss as needed. Replace head daily. Snap Off: Place handle on hard surface. Put finger on neck of handle. Press down gently to release. Snap On: With floss facing up, insert handle with REACH side up through the center of the head. Align notches and push down to snap in place. For ages 6 and up. Use with adult supervision.Uses:Easily gets to 100% of hard to reach places for an ultimate clean.CHOKING HAZARD: Small parts. Keep out of reach of children under 6.