The industrial and scientific sector requires durable and efficient tools and the DEWALT DW5237 18 Inch Premium Percussion Drill Bit exceeds expectations .Based on our own experience this drill bit has proven to be incredibly tough and can tackle even the toughest materials with ease. The flute design is top-notch, as it quickly removes debris, and the heat treatment on the bit ensures longevity, which is great value for the price. While this drill bit is slightly more expensive than others, it is worth the investment if you are looking for high quality and industrial-strength tools..