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a 3/4 hole saw with drill motor attachment, less pilot drill. it leaves just a shell over the threads which can be easily picked off with a small, sharp punch.
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https://www.instagram.com/johnwalker8704
8009 103rd pl ne Marysville Wa 98270
206 637 4071
Last edited by john walker's workshop; 08-25-2007 at 09:02 AM..
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