I have ordered several of these drills from various vendors and can say that this particular one, "Tideway", is a little better in quality compared to others and the price isn't bad at all. They don't have to be perfectly concentric (or straight), but they're not even branded blades. The shaft is nice and thick for a secure grip. When used in a drill press with a clamped workpiece, the hole is perfectly clean and an accurate diameter (14mm in my case). In manual mode, results may vary slightly depending on technique and equipment.
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