... Frankfurt, fickert, round/circle shape; polishing granite, marble, ceramic,patent stone is made of Dupont, nanometer strenghten with high neat silicon ... .Used for the surface grinding of marble, man-made stone, granite, etc. to get antique and silk-like ... arm polishing machine, levitator etc. Processing nature stone, glass brick and crystallite stone to make satin face mercerization and anti-skidding ...