SIZE - 4mm(5/32-inch) Drilling Diameter, 3.5mm(0.14-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 - 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, granite, light stone and fiberglass. (Need to be used at a low speed; Always use lubrication (water) when processing, otherwise the hole saw will burn.)