Drilax Diamond Coated Drill Bit Hole Saw Size 1/4 inch in Inch Glass, Marble, Granite, Ceramic Porcelain Tiles, Bottles, Fish Tanks, Stones, Rocks, Gems DIY Kitchen, Bathroom Renovation Drilling

High quality DIY standard diamond drill bit (hole saw). Diamond coated tip goes through Tiles, Glass, Fish Tanks, Marble, Granite, Ceramic, Porcelain, Bottles and Stones

Here is how you could use water 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- Or you can use running water to cool the drill bit.
EASY TO USE
Center pilot drill bits are for wood, metal, etc.; Here is how you can keep the drill bit on target:
a- 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.
b- 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.
c- You can manually guide the drill bit with wet sponge.