(b) 7 Pieces of 1 3/8" Diamond Wet Polishing Drum for granite marble concrete sink / basin hole / sink cutouts / tight radius (with 5/8"-11 Thread arbor). (c) 1 Piece of 1 3/8" Diamond Brazed / Electroplated Zero tolerance grinding drum wheel for sink hole inner coarse grinding / polishing (5/8"-11 Thread).
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