The Drill Doctor is a great tool to have around the workshop for sharpening drill bits. Instead of throwing dull drill bits away, now you can sharpen them and use them over again. The DD350X is another product in Drill Doctor’s line, and has gained acceptance among many home improvement experts. It’s built to sharpen any drill bit, and comes with a three-year warranty.  More than 2-million Drill Doctors have been sold to date.Buy it at Amazon.