Formed GranitekSink Cut Outs - Remodeling - DIY Chatroom Home Improvement Forum

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Old 08-06-2010, 06:02 PM   #1
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Formed GranitekSink Cut Outs

I have this sink, and I need to knock out the knockouts to install the tape. None have been punched or drilled out yet. There is however underneith the sink, pre knockouts I guess? Where it has been partially holed, just not all the way through.

What is the best way to knock these out? Someone said a ballpeen hammer, however I think that would just crack my sink? Use a particular hole saw?


rayf01 is offline   Reply With Quote
Old 08-07-2010, 07:20 AM   #2
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Formed GranitekSink Cut Outs

I would not try to knock out those precuts, but rather they should be finished drilling with a carbide or diamond hole cutter the same size, usually 1 1/8". Drill from the backside until the pilot breaks thru the top, then finish from the top.


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