Using this product our team found that it was an excellent ADDITION to our arsenal of cutting tools. The high-speed uncoated industrial-grade bits were perfect for drilling through a variety of metals without any difficulty.The bits also held up remarkably well, lasting much longer than our previous set. Additionally, the slim case and labeling made organization and identification effortless. The only downside we experienced was some difficulty in maintaining the precision of smaller bits after prolonged use. Overall, this is an excellent product for anyone in the industrial and scientific fields..