Thank you for visiting! This is a set of two items: a plaque remover and a mirror. Both are very convenient tools! This is the perfect tool for checking for areas you've missed while brushing! The mirror is for checking for plaque buildup and cavities in hard-to-see areas! For children who hate the dentist! Daily care is important for preventing periodontal disease, cavities, and bad breath!! Hardened tartar is troublesome... Let's take good care of our teeth daily before it gets to that point! And, we want to reduce the number of times we have to go to the dentist as much as possible. (^.^) Make good use of your time at home.