Using the diamond drill cutter from the Hole Saws & Accessories category in the Industrial and Scientific section was an absolute breeze. As a result of my tests I determined that this bit was versatile on different concrete surfaces and efficiently cut through them .The tool sharpened itself with each use, ensuring durability and longevity. However, it did take a while to get the hang of the best angle for cutting, but that was easily overcome with a bit of practice. Overall, a great buy for anyone in need of efficient concrete cutting tools..