I purchased the TechDiamondTools 2-1/4" Diamond Core Bit for a home renovation project that required precise concrete drilling. The 11" length of the bit was perfect for the job and I appreciated the option to use it with either wet or dry drilling techniques. Overall, my experience with this product was mixed. On one hand, it certainly delivered on its promise of precise drilling - I was able to create clean and accurate holes in my concrete surfaces without any issue. However, the process was much slower than I anticipated. Even with a powerful drill, it took a significant amount of time to create each hole, which made the project take much longer than I had planned. In addition, I found the cost of the bit to be somewhat steep - considering the length and size of the product, I felt that it was a bit overpriced for what it delivered. Overall, I would give the TechDiamondTools Diamond Core Bit 3 stars out of 5. While it definitely has its uses, the slower drilling rate and higher cost make it better suited for more specialized projects or professionals who require this level of precision on a regular basis.
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