Cutting metal using drills

Drills for metal are made of High Speed Steel (HSS) so they don't burn out when they get hot. Some have a straight shank and some (usually large) have a taper shank. Countersinks are either light duty for use with a hand drill or heavy duty for use with machines.
Drills used for metals can be used on wood, but wood twist drills cannot be used on metal.
For larger holes tank cutters or hole saws are used. These are mentioned in the wood cutting section. The cutters in the tank cutter must be suitable for metal and the blades in the hole saw must be suitable for metal.

Files are used for taking off small amounts of waste after the main bulk of the waste has been removed with a saw. They come in various sizes and shapes for tackling different jobs. The teeth on them can range from rough to dead smooth. When filing the action should come from the legs and not the arms which save you becoming tired quickly. Crossfiling takes metal off quickly while drawfiling smoothes the work and removes crossfile marks.