metrotools 12mm Diamond Drill Bits Hole Saws for Glass Ceramic Porcelain Tiles Pack of 10
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•SIZE - 12mm(0.4-inch) Drilling Diameter, 6.5mm(0.26-inch) Shank Diameter.•DIAMOND COATED - Diamond coating enhances the drilling speed, which makes the bit more sharp.•NICKEL PLATED SURFACE - Nickel plating surface can extend the service life and enhance the surface corrosion resistance.1X Generic 10Pcs 12mm Diamond Coated Core Drill Bits Hole Saw Glass Tile Ceramic Marble
