Can be processed in a variety of ceramic arm for 2-inch, 4-inch, 6-inch, 8-inch, 12-inch can be processed in accordance with the drawings, can also sample processing. Zirconium oxide, silicon nitride, alumina ceramic products: ceramic shaft, zirconia ceramic PIN, plug, zirconia ceramics arm, ceramic guides and so on. Compared with the metal mechanical arm, moisture, temperature, put expansion, corrosion, wear and the like. It can be customized according to user requirements.