we specialize in producing mechanical operating parts with "sanshi" brand. main products: knob ball, handle jacket, starlike handle, crossed handle, empaistic handle, milling machine handwheel, round rim handle, and so on. materials available: bakelite, plastic and metal screw. we can produce according your drawings and samples. due to the high quality, a reasonable price and perfect sevice, our factory has been commended by the consumers from at home and abroad.