I like using my greenlee knockout punches for that sort of thing. Just another data point Jim in case you don't want to buy the excellent alternative, the Uni-Bit.

Alistair

> On Jul 5, 2015, at 3:45 PM, Jim Felder <jim.felder@GMAIL.COM> wrote:
> 
> I'm wanting to install some USB ports in my dash. What's a recommended
> means of drilling or cutting a 1" hole in dash metal?
> 
> Thanks,
> 
> Jim