Drill bits need occasional sharpening to keep them working properly. There are some kinds of bits that can't be sharpened at all, some that can be sharpened but only carefully by hand, and then there are the kind that can be sharpened with a sharpener, such as the twist-style drill bit. The twist bit is one of the most commonly used around the house and shop. A drill bit sharpener is easy to use, and is a simple thing to sharpen your bit before using the drill. Some twist bits have a gold-colored titanium nitride coating to increase hardness; this coating will be damaged by sharpening.
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