20 - 35 - 50mm Hex Shank Diamond Step Chamfer Drill Bit for Angle Grinder for Enlarging Holes in Marble, Tile, Masonry, Concrete

20 - 35 - 50mm Hex Shank Diamond Step Chamfer Drill Bit for Angle Grinder for Enlarging Holes in Marble, Tile, Masonry, Concrete

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