On 2010-05-26, Edward A. Falk wrote:
In article ,
DoN. Nichols wrote:
I would sort of toss up between a step drill (unibit) which
would make it to 3/4" or a Greenlee Chassis punch.

For 20ga? Definately the Chassis punch.

If mild steel, or aluminum (of the stated (20 ga IIRC)
thickness), yes.

For SS I think that maybe the step drill would work a bit
better -- but I'm not sure.

If we were dealing with 16 ga or thicker, and staying with SS, I
would feel stronger about the preference for the step drill.

Enjoy,
DoN.

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