The JEFE HEX 13 piece titanium 135 degree set proved to be a high-quality addition to our industrial toolkit... Based on our own experience these bits are durable and efficient in drilling through various materials, including metal and wood. The hex design ensures a firm grip and prevents slippage during use, providing extra safety measures. The only drawback we found is the higher price point compared to other similar products, but the quality makes it worth the investment. Overall, we highly recommend this set..