To help drill in the right place a pilot hole can be made with a bradawl (wood and plastic) or a centre punch (metal).
Depending on how hard the metal is a brace, hand drill or power drill can be used.
There are different drill bits: Twist bits are used to drill small holes in wood.
High speed steel twist bits are used on metals and plastics.
Flat bits are used to drill large flat bottomed holes in wood or plastic.
Countersink bits are used to make holes for screw heads to sit in.
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