Thread: How to Make a Clean Hole with 1 1/8" Dill Bit?
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Unread 08-03-2014, 21:49
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Re: How to Make a Clean Hole with 1 1/8" Dill Bit?
We have used step drills, such as the Irwin Unibit. Grainger has an assortment of them, with some going up to 1-1/8" and larger. Harbor Freight has a set for cheap, but they don't last and are a bit dull.


http://www.irwin.com/tools/browse/dr...it-step-drills


http://m.harborfreight.com/catalogse...obile_redirect