Description of Irwin Tools 1837375 Performance Phillips: Unleashing Optimum Performance
These insert bits are built for maximum durability and long life with impact drivers. Each insert bit is manufactured with heavy-duty, cold-forged, high-grade steel. The screwdriver bits can withstand high-torque output. Precision-tip geometry on the insert bits delivers superior fitment with reduced stripping and cam-out. A black oxide finish resists corrosion to help increase the life of each insert bit.
This industrial and scientific drill bit is not worth the price. Thanks to my knowledge gained in practice, I can say that this product has a mediocre performance. While it may work for lightweight jobs, it does not withstand heavy-duty use. The only pro is that it fits in a standard drill chuck. Save your money and invest in a higher quality product. The con is the poor performance.
Pros
High performance and durability makes it a reliable choice for demanding jobs.
Cons
The price point may be too high for some consumers on a tight budget.
Good bits, I've been using the same for a few days, it fits the small #1 Phillips very well and hasn't started to round or loosen screws. I really wish manufacturers would stop using such tiny sized screw heads for most things (especially the soft screws they all use!). But if you see a lot of Phillips #1 screws, that's decent advice.