How to drill a hole in glass

Explaining in the case of drilling a 5mm-in-diameter hole in 5mm thick glass.

１ Prepare diamond bits. Left-a cylinder type bit 1～1.5mm in diameter Middle-a corn type bit 3mm in diameter Right-a corn type bit 5mm in diameter	２ A cylinder type bit in detail It's easiest to drill holes to use a cylinder type bit１～1.5mm in diameter. A cylinder type bit is easier to drill holes than a corn type one. First, drill a hole by a sylinder type bit, then enlarge it by a corn type one.	３ A corn type bit 3mm in diameter in detail
４ A corn type bit 5mm in diameter in detail.	５ This kind of drilling machine is best to use.	６ Let's drill a hole in this 5mm thick glass.
7 In water, lean a cylinder type bit against glass to make a dimple.	8 Stand up the bit and push it Into the dimple.	9 A hole opened in about one minute.
１０ A corn type bit 3mm in diameter was set in the drilling machine.	１１ Pushing to enlarge the hole.	１２ Pushed through.
１３ A hole of 3mm in diameter opened.	１４ A corn type bit 5mm in diameter was set to enlarge the hole further.	１５ Pushing.
１６ Pushed through.	１７ A fine hole of 5mm in diameter opened.