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Posted by jthread on November 2, 2007, 12:29 am
> poison_1024@yahoo.com wrote:
>> Durock, hardi-backer, wonder board etc. I assume some type of carbide
>> drill bit but what is it called? Holes big enough for pipes and
>> shutoff vales. Thanks.
>>
>
> "Hole saw"
you can do it either way but I've found it easier to punch it with a hammer
http://www.cgcinc.com/pdf/howtos/EDR_6209.pdf
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