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- ItemStep Drill Bit
- Shank Size3/8"
- Number of Hole Sizes12
- Size3/16 to 7/8"
- Step Thickness1/16"
- MaterialHigh Speed Steel
- DesignEnsures True Starts Without Walking Even on Curved Surfaces
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Ask your questions. Share your answers.
For a glass block, you are going to want to use a drill bit that is specified as a glass / ceramic drill bit, such as 3AEE2.
One thing I can tell you from experience, you will want the glass you are drilling to be under water if at all possible. That way you will keep the drill bit cool and lubricated (both are very important), and if you accidentally shatter the glass you are drilling, then the shards won't fly everywhere.
Also, take your time.
Glass and ceramic drill bits use an abrasive to rub their way through the work, as opposed to cutting, like traditional drill bits do, so they are more susceptible to heat build up.
Grainger is neither responsible for, not does it endorse, the content of any statement posted. Any statements posted constitute the statements of the poster and are not the statements of Grainger.