5pcs Diamond Drill Bits for Glass, Marble, Ceramic, Granite, 5/32" to 1/2"

Diamond Drill Bits, PHITUODA 5pcs Diamond Hole Saw Glass Hole Saw Tile Hole Saw Hollow Core Drill Bit for Glass, Marble, Ceramic, Granite, 5/32" to 1/2", 4 - 13mm Specification: Material: High-Speed Steel Color: Silver Finish: Nickel-plated Hole Diameter: 5/32" / 4mm, 1/4" / 6mm, 5/16" / 8mm, 3/8" / 10mm, 1/2" / 13mm How to Use: 1. Put glass drill into the driller. 2. Because this hole saw cannot locate the center, so please cutting with it slowly with 45 degrees. 3. Please cut a small mark first to locate the center, then you can cut the material vertically. 4. The speed needs to be controlled, not too fast and water is required during cutting. Attention 1. When you using the diamond drill bits, please use lubrication (water). Otherwise, the diamond core drill will burn. 2. Please do not cut metal material with this tool. 3. Not for use on Concrete or for depths beyond about 1/2". 4. Please keep the speed within 800-1000 per minute, low drill pressure, and increased use of water lubrication will extend drill bit life. Warm Tips: 1. Due to manual measurement, please allow 1-2mm difference, thanks! 2. Our digital images are as accurate as possible. Because of the difference between the display and the light, the color is slightly different. Excellent & Sincere Service PHITUODA wants our customers to be 100% happy and satisfied. We provide an e-mail reply within 24 hours to handle product issues at our Amazon store. PHITUODA provides a full refund for any reason within 90 days after the date of purchase. What are you waiting for? Click the "ADD TO CART" button to see for yourself all the benefits of this amazing new product! Take advantage and buy it NOW!

• *Package Included: Total 5 different sizes (5/32" / 4mm, 1/4" / 6mm, 5/16" / 8mm, 3/8" / 10mm, 1/2" / 13mm). Different sizes meet your different needs, help you in different places.
• *Quality Selection: These diamond drill bits are made of high-speed steel which is high quality and durable. With a nickel-plated coated body to resist corrosion, which has a long service life. Large chip holes to ensure that when the punching smooth, punching accurate.
• *Smoothly Cutting: A thick diamond dust coating on the tops offers superior cutting strength for creates a high precision, smooth cut with no broken edges. Please reduced drill speeds, low drill pressure, and increased use of water lubrication will extend drill bit life considerably.
• *Multiple Applications: The diamond drill bit can remove a complete & clear hole on glass, tiles, granite, ceramic. In addition to cutting holes for glass, the Hole Saw comes in handy for tile bottles, blocks jars, fiberglass, porcelain tile, ceramic, slate, marble, light stone. Not for use on Concrete or for depths beyond about 1/2".
• *Hassle-Free Guarantee: PHITUODA's products can only be packed and shipped after strict quality inspection. If you are not satisfied within 90-days, send 1 simple email and receive a 100% money-back refund. We're so confident you will love our products like our other 5-star reviewers! You will be amazed at the customer service you receive after the sale!