A secured transaction is a transaction that is founded on a security agreement. A security agreement is a provision in a business transaction in which the obligor, or debtor, in the agreement gives to the creditor the right to own property owned or held by the debtor.
If your brush has two speeds, and uses brush heads with slim-angled necks, then you have a Sonicare Elite. An Elite toothbrush has a thread collar screw on brush head.
Many companies make a variety of different sizes and types of interdental toothbrushes. These specially designed toothbrushes are used to clean between teeth where traditional toothbrushes cannot reach. Certain interdental toothbrush models can take the place of regular flossing.