Instructables

Step 2: Remove the Flange Lip

Picture of Remove the Flange Lip
First step is to remove the lip from the 9 flanges that will be used to support the shelves so the pipe slides all the way through. I used a metal hole saw to get the majority of the lip out and then used a grinder to get the remaining.

I forget the exact size of the bit (after the 9 flanges it was useless and thrown away) but it just fit inside the flange.

The flanges were screwed down to the table to keep them secure during drilling

note: the following action likely voids any guarantee or warranty the Kee Klamps have.
 
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use threaded rods in place of pipes  and nuts and washers instead of flanges. its a bit different look but accomplishing the same thing