In this study we propose the sensory substitution device for the visual impaired named FB-Finger. This device has an intuitive interface that perceives distance with object by bending and stretching the finger. The user takes the searching behavior with shaking the device and moving. As a result, the user can perceive the shape of the object like tracing by the finger. We produced units named FB-ToolKit to develop FB-Finger more effectively. Units have a common communication method. Therefore, we can easily construct and change the system. This paper describes the system of FB-ToolKit, examination of frame design and plan of psychology experiment.