sourcingmap 5PCS 20mm Diamond Coated Hole Saw Drill Bits for Glass Ceramic Tile Marble Rock Porcelain Bottles Pots Brick

• SIZE - 20mm(0.8-inch) Drilling Diameter, 8mm(0.31-inch) Shank Diameter. The hole saw achieves high precision and smooth cuts without edge breakage, with good toughness and high strength.
• DIAMOND COATED - Diamond coating enhances the drilling speed, which makes the bit more sharp.Electroplated diamond is uniform and more wear-resistant.
• 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.
• 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. Not suitable for drilling tempered glass, plastic and wood.
• 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.)

Description: 1. Designed for drilling 20mm diameter holes. 2. Nickel-plated hole saw drill bit with a diamond dust coating offers superior performance and cutting strength. 3. Cut clean and round holes to a depth of approximately 30mm. 4. Excellent for making clean and accurate hole on glass, tile, marble and other fragile materials. 5. Always use lubrication (water), otherwise the diamond coated drill bit will burn. 6. Start your hole diagonally, make a round trace and then hold drill straight. 7. Works better with an electric drill (Excluding in this item). Specifications: Product Name: Glass Hole Saw Material: Metal Body Coating: Nickel Plated; Tip Coating: Diamond Plated Cutting Diameter: 20mm / 0.8-inch Drilling Depth: 30mm / 1.2-inch Shank Diameter: 8mm / 0.3-inch Total Length: 55mm / 2.2-inch Revolutions Per Minute: 800-1000 Main Color: Silver Tone Weight: 123g Package Content: 5 x Glass Hole Saws