Diamond Coated Hole Saws Drill BitsProduct Details1.NICKEL PLATED SURFACE - Nickel plating surface can extend the service life and enhance the surface corrosion resistance. Diamond coating maximizes performance and retains a sharper cutting edge than traditional carbide or bimetal hole saws.2.DIAMOND COATED - Diamond coating enhances the drilling speed, which makes the bit more sharp.Electroplated diamond is uniform and more wear-resistant.3.SIZE - 7mm(0.28-inch) Drilling Diameter, 1/4-inch Shank Diameter. The hole saw achieves high precision and smooth cuts without edge breakage, with good toughness and high strength.4.SPECIAL DESIGN - The diamond hole saw with clearance hole facilitates the entry of cooling water and the escape of chips from the drilled hole. Makes the drilling process easier.
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