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Old May 21, 2011, 05:39 AM
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Mnpctech Mnpctech is offline
Join Date: Oct 2009
Location: Minnesota
Posts: 879

If you're using 1/2" Hole saw Arbor, your Drill size must be 1/2"

Quoted from Amazon Product Description

It can be used in 1/2 inch capacity drills and larger. The arbor has a 5/8-18 thread and can be used on hole saws from 1-1/4 inch and larger.
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