... PURPOSEFOR IRREGULAR METAL WARE,DIECASTING,PLASTIC,LACQUER,WOOD.USED EXTENSIVELY IN MANUAL,SEMI_AUTOMATIC AND AUTOMATIC MACHINES.FOR FINE AND NON_STREAK ... SILICONE CARBIDE,AND IN VARIOUS GRAINS AND DIMENSIONS.THEY CAN BE USED ON MANUAL SUITABLE TO BE ASSEMBLED IN ORDER TO MAKE A ... LONG ROLLER TO BE USED ON BENCH_MOUNTED OR PILLAR ...