Bulk Package Set of 10 Drilax Diamond Coated Drill Bit Hole Saw Size 5/16 inch in Inch Glass, Marble, Granite, Ceramic Porcelain Tiles, Bottles, Fish Tanks, Stones, Rocks, Gems DIY Kitchen, Bathroom R

10 Pieces Lot of 5/16 inch Diamond Drill Bit Set\n\nBulk Package\n\nSet of 10\n\nHigh-quality DIY standard diamond drill bit (hole saw). Diamond-coated tip goes through Tiles, Glass, Fish Tanks, Marble, Granite, Ceramic, Porcelain, Bottles, and Stones\n\nHere is how you could use water to keep the tool cool:\na- You can build a mini water dam around the hole with plumbers putty.\nb- You can choose to spray water on the drill bit.\nc- Or you can use running water to cool the drill bit.\nEASY TO USE\nCenter pilot drill bits are for wood, metal, etc.; Here is how you can keep the drill bit on target:\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.\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.\nc- You can manually guide the drill bit with a wet sponge.