Diamond Drill Bit Set, 11PCS Hollow Core Drill Hole Saw Set with Hole Saw Guidance Fixture, Suitable for Tile, Ceramic, Glass, Porcelain, Marble, DIY Kitchen Bathroom Shower 6-50mm

Two Fixing Modes Available Mode 1, Adjustable Plate Obverse Side: You can fix your hole saw with 4 bearing balls,for sizes up to 3-1/4 inches Mode 2, Adjustable Plate Reverse Side: Place the plate reversely then remove one bearing ball to the bearing hole, you can fix your hole saw with 3 bearing balls,for sizes up to 1-3/4 inches Tip: How to keep the drill bit on target (1) You can start drilling at an angle, with the edge of the drill bit making a C slot and then getting the drill bit up to vertical. (2) You can manually guide the drill bit with wet sponge (3) You can make your own guide out of plywood - plastic or even a card board. All you need is to keep the drill bit in place until it makes the initial marks. Tip: How to drill correctly: 1.Firstly, mark the point where you want to drill the hole; 2.Next, fix the drill at the angle of 45°to make a drilling trace at a high rotating speed;and add water during the drilling process; 3.Then drill vertically from the other side of the drilling trace at a slow speed to prevent breakthrough. Tip： How to keep the tool cool a- You can build a mini water dam around the hole with plumbers putty. b- You can choose to spray water on the drill bit. c- You can use running water to cool the drill bit. Tips: 1. Not suitable for concrete or concrete deeper than 1/2 inch. 2. If you smell a burning odor, step back! Too fast or stressed. 3. Water should be used as a lubricant and coolant when drilling, which will greatly extend the service life of the drill. Package includes 10PC diamond drill 1PC adjustable hole saw guide fixture 1PC screwdriver 1 instruction manual.

• 【Superb Craftsmanship】These diamond drill bits are made of industrial-grade carbon steel and have a nickel-plated coating to resist corrosion. Coated with high-quality diamond, the diamond hole saw creates a high precision, smooth cut with no broken edges. Reduced drill speeds, low drill pressure, and increased use of water lubrication will extend drill bit life considerably
• 【10 Different Sizes Diamond Hole Saw】6mm/0.23", 8mm/0.31", 10mm/0.39", 12mm/0.47", 20mm/0.78", 25mm/0.98", 30mm/1.18", 35mm/1.38", 40mm/1.57", 50mm/1.97". They are made of high-strength carbon steel makes these diamond drill bits durable.
• 【Adjustable Fxture】Adjustable hole saw drilling guide fixture with suction cup-the maximum opening length of the board is 3-1 / 4 ", which is large enough to fit in all size hole saws. Movable ball bearings, two modes (fixing 3 or 4 bearings) are your choice, just flip the board.
• 【Ergonomic Design】The large clearance holes along the drill bit help the entry of cooling water and the escape of chips and other particles from the borehole, ensuring smooth punching and making the drilling process easier. Small holes-When debris gets stuck in the hole saw. We can use our screwdriver to pull it out. To provide you with the perfect experience.
• 【Best Choice】This diamond-coated hole saw bit can be used to remove rings on glass, marble, tile, ceramic, PVC, or other materials. When the diamond bit is working, please continue to add water to reduce the drilling speed, reduce the drilling pressure, and increase the water lubricity, which will greatly extend the life of the bit