Review on Drill America DWDGD Set Carbide Tipped by Jason Porter

I may or may not have used this particular brand, but I have used many (30+) of this type in the past. They cut very slowly, tend to walk on hard, smooth surfaces, and the blades break quite often. Make sure you use water to keep the tip cool or it will break much faster. I would recommend four point drill bits as they last longer, cut faster and are less likely to break what you are drilling. Also, it's not the best price, which is why I chose it for the review. .