new punch tool.

[DKS]

Another option-
http://roperwhitney.com/punching/2-45.cfm
You can get square,rectangle, etc punches for it.
Depending on hole size,we've used ours (including the "junior")on 16 gauge steel or better.
Harbor Freight sells a cheaper chinese rip-off,but I don't know if Roper punches will fit it.

I've got one of those beasts. Not as useful as they look. In addition to being a rather awkward tool to use, the precision isn't fine enough for punching thin sheet metal, and the holes it leaves in styrene are pretty rough. It's best for punching medium-weight sheet metal, and not much else.

[rogergperkins]

David, thank you for the critique of the Roper Whitney tool!