<b>Diamond Drill Bit Set, THINKWORK 10 PCS Glass Hole Saw for Tiles Glass Ceramic Marble, 6mm -- 50mm</b> <p><b>Why do customers choose to buy our diamond hole saw set?</b> 1. These diamond drill bits are made of industrial grade carbon steel and have a nickel-plated coating to prevent corrosion.<br> The thickened diamond coating on top provides excellent cutting strength.<br> 2.10 different drills, can meet various needs: 6mm, 8mm, 10mm, 12mm, 20mm, 25mm, 30mm, 35mm, 40mm, 50mm<br> 3.Adjustable hole saw drilling guide fixture with suction cup + exquisite screwdriver.<br> <p><b>Hole saw guide:</b> Material: rubber base + plastic shell + steel<br> <b>Two fixed modes are available:</b> Mode 1, reverse side of adjustable plate: You can fix the hole saw with 4 bearing balls, the maximum size is 3-1 / 4 inch.<br> Mode 2, Adjustable plate reverse side: Place the reverse rotation plate, and then move a bearing ball to the bearing hole. <br> You can fix the hole saw with 3 bearing balls, the maximum size is 1-3 / 4 inches.<br> <p><b>NOTE:</b> 1. If you smell a burning odor, step back! Either it is too fast or the pressure is too great.<br> The bit you are drilling must not be exposed to high temperatures or even heat.<br> 2. Not suitable for concrete or deeper than 1/2 inch.<br> 3. Lubricating water is needed when drilling, which will greatly extend the life of the drill.<br> <p><b>The package includes:</b> 1 PC hole saw rail clamp<br> 10 PC diamond coated drill<br> 1 screwdriver<br> 1 instruction manual<br>