You'll be flabbergasted when you see what a specialist micro-machining shop can produce. (I am!) Unfortunately there's only one picture on their website [1],

You'll be flabbergasted when you see what a specialist micro-machining shop can produce. (I am!) Unfortunately there's only one picture on their website [1], but here's an example of a shop that produces really small bits. [1] http://www.russellsymes.com.au/ http://www.russellsymes.com.au/