SWZHAI Dry Diamond Drill Bits Set 4 Pack 9/16 inch, Diamond Hole Saw Kit Round Shank for Granite Stone Marble Porcelain Glass Brick Tile Ceramic Hard Materials, Not for Wood (9/16 inch, 4)

Notes: 1. Dry drills with specifications above 8MM (6MM diameter dry drills do not need to be cored). When use the drill bit, cores are required for every 1-3 holes drilled. 2. Do not use an electric drill with a speed lower than 2000, or will affected the service life of the drill 3. During using the dry drill, no need to add water to the ceramic tile, besides, the drill body heats up into steam to cool the drill bit, so do not use cooling water. How to drill clean and precise holes： 1. Star Drilling the hole with 45 degrees angle to the surface can prevent the drill slipping 2. Slowly move the diamond tip drill bit into a more up-right position and wobble the drill bit in the circular motion 3. Not need to apply much pressure, jut let the drill bit do the job, you will see the drill bit break through the glass or tile after the hole is completed drilled. 4. Please take care when using drill bits as can glaze and burn out if using too fast Package included:4PCS Dry Diamond Drill Bits

• 9/16" Diameter: Drill bits set contains 4 pcs bits for drilling holes diameter of 9/16 inch(6mm).
• Dry Diamond Hole Saw: The diamond drill bits are injected wax lubricant to melt and cool the drilling surfce when dry drill
• Material Technology: Masonry drill bit set is used vacuum brazed diamond technoloy, good for drilling clean holes to hard materials such as concrete, tiles, granite ceramic glass, porcelain ground, mirror , stone and masonry brick, please note it is not for wood using.
• Special Details: These tile drill bits are diamond coated for enhancing the drilling speed; Round Shank design is suitable for most machines such as Angle Grinder, Hand Drill and Bench Drill; Side flutes can smoothly and fastly to remove debris and drill holes ; Depth mark is useful for precise project.
• Package Included: This Diamond Drill Bits set contains of 4pcs same size drill bits, we offer 6 different size for your choosing: 1/4", 5/16", 3/8", 1/2", 9/16", 5/8"