Homebrew PCBs

Stefan,

For a drill bit size chart try:

<http://drillbitcity.com/images/charts/drill_bit_comp_chart.pdf>

Bob

> Hi,
> 
> 
> My drills are all without the little plastic rings, so i bought a
> small  lot with rings in the hopes of using them. How can those rings
> be set? does it work with a metal tube and a little  hammer?
> 
> Also, if somebody knows a inch/metric PCB drill conversion table (with
> the  #), please let me know. it isn't that important as i can easily
> calculate  it myself, but if you know a url...
> 
> ST
> 
> 
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