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.
Recent toothbrush heads, such as the Oral-B Pulsar, include rubber blades as well as stiff bristles. These make an even better performing bristlebot that is faster in a straight line. Domestic scrubbing brushes, with larger motors, may be used to make larger brushbots with equally simple construction.