>I want to make holes in plastic and metal enclosures for SUBD connectors
>(9 and 15 pins for a start), for small-scale production (10..100). I
>think the term to look for is 'punch', and I found some at mouser and
>digikey. Anyone got experience with these things, recommendations?

You can also get them from farnell. I just searched for "chassis punch" and 
it came up with a dozen items including D-submin ones in the sizes you want.

I haven't tried using them in plastic before, but they do make a beautiful 
job in metal. 

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