This sharpener has carbide steel rods to shape the blade ... Drill Doctor offers several versions of a special tool that makes drill-bit sharpening almost foolproof. The least expensive tool ...

you can sharpen drill bits without a heavy-duty tool — all that's really needed to do a reasonably good job is a diamond file. And if you're cutting into carbide or hard high-speed steel (HSS ...

These inexpensive tools, starting at around $10, are essentially steel rods with ... In the process, bits of metal are actually shaved away. That's why sharpening a metal blade calls for material ...