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I purchased these drill its to make 1/2" holes in glass bricks & bottles so that my wife could put small Christmas lights inside as a holiday decoration. They work well but since there is no centering bit it would be very difficult to start a hole with a hand drill. fortunately I had access to a portable drill press so they worked quite easily. As a caveat, you should go slow with a minimum of pressure and be sure to use water to cool and lubricate as you drill.
Great product for a good price. No problem drilling through tile. The smaller sizes (e.g., 1/4", 5/16", & 3/8") do not have any means of clearing the flute of debris, whereas other hole saws have openings for just such a purpose. This is the only reason I rate this product a 4 rather than 5; otherwise, a great product that I'd recommend to anyone who needs to drill through ceramic tile.
Bought the set to drill a hole in 3/4 thick granite countertop to install an undercounter water filter system. Was worried that I needed a much more expensive tool, but it worked like a charm, cutting the hole in less than five minutes of drilling. I kept the bit wet with a sprayer, and used the tip from another poster to clamp a board over the spot and use it as a drill guide. Not sure whether I will need the rest of the bits, but is a nice tool to have handy in the future.
I also wanted to save all of the labels on the bottle, so I minimized the amount of water used. Once the hole is started it is fine.
Unlike the other reviewers I used a wood clamp to hold the bottle on my Drill press. I ordered these hole saws because I wanted to convert a Wine bottle into a lamp.
The hole saw worked well in this application.The problem with using a hole saw without an Arbor is that it will "Wander" and not make a clean initial cut. It is recommended to use them at 300 RPM, but my drill press only goes down to 500.
I used a small water spritster to wet the area and occasionally add water to the cut. That is why I used the clamp and drill press.
I did also cover the labels with shrink wrap and masking tape to protect them from accidental water damage.
That's why it took so long.At any rate, the 1" drill bit in this set worked wonderfully. But, finally, he was through.
I only needed the largest drill bit, 1 inch diameter.I had this idea to make a lamp shade out of a gorgeous glass vase from Italy. The opening had to be 1".My brother put the bit in his drill.
I bought this set of glass cutting drill bits because it was a good price. He didn't want to apply too much pressure, which would break the vase.
We put the vase upside down (so the bottom was up) in a 5 gallon bucket. While he drilled, I poured cool water on the bit and vase.It took about 10 minutes.
We didn't know prior to starting that the glass at the bottom of the vase was just over 1 inch thick. And now I have a one-of-a-kind Italian Glass lamp hanging above my dining room table.
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