Description:

Size - 6mm Drilling Diameter, 5.5mm Shank(10pcs); 7mm Drilling Diameter, 6.2mm Shank(10pcs). Diamond Coated - Diamond coating enhances the drilling speed, which makes the bit sharper.. Nickel Plated Surface - The nickel plating surface can extend the service life and enhance surface corrosion resistance.. Special Design - Side open can remove the waste to keep the drill bit clean.. Applications - Perfect for drilling glass, ceramics, porcelain, ceramic tile, porcelain tile, limestone, slate, marble, light stone and fiberglass. (Need to be used at a low speed; Always use lubrication (water) when processing, otherwise the hole saw will burn.).