\n\nDrilax 5 inch Diamond Hole Saw Drill Bit Tiles, Glass, Fish Tanks, Marble, Granite, Ceramic, Porcelain, Coated Core Bits Holesaw DIY Kitchen, Bathroom, Shower, Faucet Installation\n\nThe diamond particle coating on DRILAX hole saws gives superior performance and lifetime.\n\nPlease note our tools do not need center pilot holes. Center pilot hole drills are mostly for wood, metal, etc.\n\nDrilax tools can drill 1 " in depth. 3/8 inch Shank Size for STANDARD Electric or Rechargeable Drills - Also perfect for upright drills. Never let your drill bit run dry.\n\nThe electroplated diamond coating will wear off if the tool gets too hot.\n\nHere is how you could use water to keep the tool cool:\n\na- You can build a mini water pool around the hole with plumbers putty.\n\nb- You can choose to spray water on the drill bit.\n\nc- Or you can use running water to cool the drill bit.\n\nEASY TO USE Center pilot drill bits are for wood, metal, etc.;\n\nHere is how you can keep the drill bit on target:\n\na- You can make your own guide out of plywood - plastic or even cardboard. All you need is to keep the drill bit in place until it makes the initial marks.\n\nb- 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.\n\nc- You can manually guide the drill bit with a wet sponge.\n\nPlease use protective gear. For more DIY information please visit our instructions page.\n\n