1. Tape with paper-type tape around the slot-to-be, mark it.
2. Then make indentation with paper-cutter.
3. Heat paper-cutter (sharp thin blade knife) -- you might be able to get
one type that can fit into your soldering iron.
4. Slice the plastic with the heated-cutter.  It should slice the plastic
like a piece of  butter.
5. goback to 3, until done

** Hot enough cutter is crucial, and be careful that it doesnot become so
hot that melt the holder.

Cheers, Ling SM

> >I want to make a small rectangular hole on a plastic
> >enclosure so as to fit in a slide switch, but since it
> >is not circular, I cannot use a drill. Is there any
> >way or tools to make this hole easily?

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