HSS Cobalt Drill Bit, 1mm Diameter Twist Drill bits, Split Point for Drilling Metal Steel Aluminum 10Pcs

**Editorial Review** The HSS Cobalt Drill Bit set, featuring 10 pieces of 1mm diameter twist drill bits, has received a mix of feedback from customers regarding its performance and utility for drilling various materials. Many users find that these drill bits perform at a satisfactory level for mild steel, with reports indicating an impressive lifespan of 300-400 holes per bit. Customers appreciate the ability to sharpen these bits when they dull, which is a significant advantage over coated bits that cannot be. However, there are notable critiques, particularly regarding their effectiveness on harder materials such as stainless steel; some users struggled to drill through 1.5mm thick stainless steel, but found success after manually sharpening the bits. Concerns also arise regarding their durability, with some users reporting breakage when attempting to drill into harder materials like steel screws. There are indications that these bits are more suited for softer materials, such as plastic, wood, or softer metals. Additionally, one user pointed out an issue where their purchase was short by one bit, which can be a disappointing oversight even Considering the budget-friendly pricing. Overall, while the HSS Cobalt Drill Bits can adequately handle basic drilling tasks, users should be cautious when working with tougher materials. Those familiar with sharpening bits and needing precision in smaller sizes will likely find these a practical choice, albeit with some limitations. **