I assembled a bunch of furniture and an adjustable bed that took some torque and bits are holding up really well. I was worried they would suck, but they went through 3 hours of medium work today, but less than 10% of the time I did not use the impact drill. But bits still look great and should last me a long while. The bit holder magnetization is weak, and the bits can pull out too easy. It does come with a weird smell that maybe the rubber or oiling on the metal though? It's a little pricey at $15... But trade off is they are good quality.