US Patent 8074666 Brushes with interchangeable heads

One embodiment of a head-switchable brush, comprises a brush head, a ferrule, and a brush handle. The ferrule has the head at one end and the handle at the other end. There is a piece of magnet attached to the brush handle and ferrule respectively where the two parts connect. The brush head can be switched and assembled with the handle easily whenever needed. The ferrule can be kept firmly on the handle by the action of the magnet inside. The head-switchable function of this brush kit can greatly enlarge the brush applying space and also avoid the material wasting since this brush kit has one handle only but with various brush head.