As a hesitant buyer, I can attest that the Norske Tools NIDBP280 Titanium Plastic drill bits are truly impressive. As my tests showed, these cutting tools have excellent durability and precision, allowing for effortless drilling on hard surfaces.The bits stay sharp even after multiple uses, ensuring long-lasting performance. The only downside is that they come at a slightly higher price point compared to other drill bits in the market. Overall these industrial and scientific-grade drill bits are a must-have for any serious craftsman or DIY enthusiast..