atozshop11 5PCS 12mm Diamond Coated Hole Saw Drill Bits for Glass Ceramic Tile Marble Rock Porcelain Bottles Pots Brick
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DescriptionSIZE - 12mm(0.55-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..SPECIAL DESIGN - Slotted edges make it mo
