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I bought this Drill Hole Saw for drilling holes in some very hard porcelain tile. They worked exactly as needed. I chucked the 1″ bit inside a drill press, constructed a little dam with modeling clay across the hole to hold a small amount of water and ran the bit at a slower speed. It cut an attractive hole fairly quickly. I can’t communicate to their long-term sturdiness, although following cutting a dozen=plus holes the bit was nonetheless executing well. Overall, I was extremely happy with the price/performance ratio – nicely worth the money.
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