Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Super!

I've learned the hard way that HSS and Titanium Nitride bits don't hold their sharpness well when pushed hard. Cobalt bits like the Milwaukee set are the only way to go if sharpness over time is important to you. The Milwaukee set has the commonly used sizes (fractional sizes) and will work well for years, regardless of their use. I trusted Milwaukee because of their reputation for fine tools and am not disappionted.