How to Sharpen Drill Bits
Many homeowners are unaware that their drill bits require regular sharpening to give their best service. Just like knives and axes, a dull drill bit requires more force to do the same job. Instead of wearing out your muscles, a dull drill bit will inevitably wear out your drill. The best way to protect your investment in high-quality power tools is to give your drill bits regular spot sharpening with a file. Use a grinder or visit a professional sharpener if the bits become really dull.