(b) 7 Pieces of 1" / 25 mm DRY Polishing Drum for granite marble concrete sink / basin hole / sink cutouts / tight radius (with 5/8"-11 Thread arbor). Fits on wet / dry polisher, Dry Use. -Ideal speed (of polisher / grinder) capacity is 4000 RPM, Not be higher than 5000 RPM.
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