... . Through grinding the surface of the stone, it could get the archaized effect.It adopt TYNEX®A from DuPont U.S.A ... (Nylon 612 with grit inside),it has the advantage of high speed of aggressive, long life ... #coarse grinding120# ,180# ,240# rough polishing320 #,500# fine polishing Diam.110/130mm snail lock abrasive nylon brush