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Some call it Stereolithography. Others call it Rapid Prototyping. What it is: a 3 dimensional printer. It makes plastic things using computer drawings as the guide.
Machinist School says, "Making plastic parts just got easier!" Check this out:
A 3D printer ..... draw it, print it. Make plastic doodads. Thingomatic is a $1,300 build it yourself kit from MakerBot.
http://store.makerbot.com/makerbot-thing-o-matic.htmlA good 3D drafting program with excellent free/online video tutorials.
Of course, to drill a hole through a concrete wall, you still need a drill. But if you need a plastic knob for your radio, this could be a solution.