Brand: Colorful Ha Ni

 Approximately 16.5 cm in length and uses two AA batteries for power (Batteries is not included) Suitable for 2mm diameter grinding head only. Included 5 different type of grinding heards:  Conical Metal Grinding Head                                                 - Ideal for sanding scratched and edges.White Round Shaped Sanding Head & Cylindrical Sanding Head            - Ideal for polishing.Red Round Disc-Shaped Sanding Head                                          - Ideal for polishing, especially for inner frame arcs and joint.Wool polishing head                                                         - Ideal for general polishing of most ferrous metals, stones, glass and ceramics to produce a smooth finish.