(d) 6 Pieces of 1 3/8" / 35mm 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" / 35mm Diamond core bit / hole saw for stone concrete sink hole cutting (with 58"-11 Thread arbor).
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